For the first equation, we can complete the square to find its vertex form. Here's how we do it:
0 = x^2 - 18x + 1
0 = (x - 9)^2 - 80
So we have (x - 9)^2 = 80. This is in the form (x - p)^2 = q, where p = 9 and q = 80.
For the second equation, we can complete the square in a similar way:
x^2 + 26x + 167.5 = 0
x^2 + 26x = -167.5
x^2 + 26x + (26/2)^2 = -167.5 + (26/2)^2
(x + 13)^2 = 9.25
So we have (x + 13)^2 = 9.25. This is in the form (x - p)^2 = q, where p = -13 and q = 9.25.
I hope that helps!
Sue deposited $1,500 into two different accounts.
- She deposited $600 into an account that pays 7.5% simple interest.
- She deposited $900 into an account that pays 6% compounded annually.
If Sue does not deposit additional money into the accounts and she doesn't withdraw any
money from the accounts, which is closest to the total balance she will have in the two
accounts at the end of 5 years?
F $2,029.40
G $2,005.68
H $529.40
J $1,995.00
The total balance that Sue will have in the two accounts after 5 years can be calculated as follows:
Balance of the first account with simple interest:
FV = P(1 + rt)
FV = $600(1 + 0.075 x 5)
FV = $825
Balance of the second account with compounded interest:
FV = P(1 + r)^n
FV = $900(1 + 0.06)^5
FV = $1,286.87
Total balance = $825 + $1,286.87
Total balance = $2,111.87
The closest answer choice to this amount is F) $2,029.40, which is only off by a small margin. Therefore, the answer is F) $2,029.40.
Mr. Ed earns $15.50 per hour. His regular hours are 40 hours per week, and he receives
time-and-a-half overtime. Find his total pay for a week in which he works 45 hours.
Answer:
For the first 40 hours that Mr. Ed works, he earns his regular rate of pay, which is $15.50 per hour. So, his regular pay for the week is:
40 hours x $15.50 per hour = $620
For the additional 5 hours he works, he earns overtime pay at a rate of time-and-a-half, which is 1.5 times his regular pay rate. So, his overtime pay for the week is:
5 hours x $15.50 per hour x 1.5 = $116.25
Therefore, Mr. Ed's total pay for the week in which he works 45 hours is:
$620 (regular pay) + $116.25 (overtime pay) = $736.25.
I will mark you brainiest!
The value of M is
A) 14
B) 18
C) 20
D) 28
Answer:
I got 28
Step-by-step explanation:
use the formula k=y/x. 6/8=0.75
21/0.75=
What is the fourth term of the sequence:
Write the number in the blank only.
a_1 = 5
a_n = 2a_n-1 + 3
The fourth term of the sequence with the definition of functions a₁ = 5 and aₙ = 2aₙ₋₁ + 3 is 61.
Calculating the fourth term of the sequenceGiven the following definition of functions
a₁ = 5
aₙ = 2aₙ₋₁ + 3
To find the fourth term of the sequence defined by a₁ = 5aₙ = 2aₙ₋₁ + 3, we can use the recursive formula to generate each term one by one:
a₂ = 2a₁ + 3 = 2(5) + 3 = 13
a₃ = 2a₂ + 3 = 2(13) + 3 = 29
a₄ = 2a₃ + 3 = 2(29) + 3 = 61
Therefore, the fourth term of the sequence is 61.
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Suppose
cos()=3/4
.
Using the formulas
Determine
cos(
Answer:
Step-by-step explanation:
I'm sorry, but there seems to be some information missing from your question. Specifically, it is unclear what quantity or angle you want to determine the cosine of.
If you meant to ask for the value of the cosine of an angle given that its sine is 3/4, then we can use the Pythagorean identity to determine the cosine:
sin^2(x) + cos^2(x) = 1
Plugging in sin(x) = 3/4, we get:
(3/4)^2 + cos^2(x) = 1
Simplifying, we have:
9/16 + cos^2(x) = 1
Subtracting 9/16 from both sides, we get:
cos^2(x) = 7/16
Taking the square root of both sides, we get:
cos(x) = ±sqrt(7)/4
Since the sine is positive (3/4 is in the first quadrant), we know that the cosine must also be positive. Therefore:
cos(x) = sqrt(7)/4
I hope this helps! Let me know if you have any further questions.
CAN SOMEONE HELP WITH THIS QUESTION?
Answer:
a. Since the half-life of the isotope is 8 hours, we know that the decay rate is exponential and we can use the formula:
A(t) = A0 * (1/2)^(t/8)
where A0 is the initial amount of the substance, t is the time elapsed, and A(t) is the amount of substance remaining after t hours.
Substituting the given values, we get:
A(t) = 7 * (1/2)^(t/8)
b. To find the rate at which the substance is decaying, we need to take the derivative of A(t) with respect to t:
A'(t) = -7/8 * (1/2)^(t/8) * ln(1/2)
Simplifying, we get:
A'(t) = -ln(2) * (7/8) * (1/2)^(t/8)
c. To find the rate of decay at 14 hours, we can plug in t=14 into the equation we found in part b:
A'(14) = -ln(2) * (7/8) * (1/2)^(14/8) ≈ -0.4346 grams per hour (rounded to four decimal places)
Need help pls
geometry
#23
Answer: I think its C
Answer:
Step-by-step explanation:
C is false. [tex]\angle BEC = \angle AED=126[/tex] (vertically opposite).
The rest are correct.
View the photo and solve the probability
Therefore, the probability that at least one of the next six births is a girl is 1 - 0.033 = 0.967 (rounded to three decimal places).
What is Probability?Probability is a measure of the likelihood that an event will occur. It is a number between 0 and 1, with 0 indicating that the event is impossible and 1 indicating that the event is certain.
To calculate the probability of an event, you divide the number of ways that event can occur by the total number of possible outcomes. For example, if you flip a fair coin, there are two possible outcomes - heads or tails - and each has an equal probability of 0.5 (or 50%) of occurring.
Given by the question.
To find the probability that at least one of the next six births is a girl, we can find the probability that all six of them are boys and subtract it from 1.
The probability that one birth is a girl is 1 - 0.513 = 0.487.
The probability that all six births are boys is. [tex]0.513^{6}[/tex] = 0.033.
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I need help with a problem on my test.
Write an exponential function to model the situation. Tell what each variable represents. A price of $115 increases 9% each month.
Please help
Answer: 1050$
Step-by-step explanation:
im a math teacher
Find the derivative of f(x) 5/x + 7/x^2
Answer:
[tex] \rm \: f(x) = \dfrac{5}{x} + \dfrac{7}{ {x}^{2} } [/tex]
Differentiating both sides with respect to x
[tex] \rm \dfrac{d}{dx} ( {f}( x) = \dfrac{d}{dx} \bigg( \dfrac{5}{x} + \dfrac{7}{ {x}^{2} } \bigg)[/tex]
Using u + v rule
[tex] \rm \: {f}^{ \prime} x = \dfrac{d}{dx} \bigg( \dfrac{5}{x} \bigg) + \dfrac{d}{dx} \bigg( \dfrac{7}{ {x}^{2} } \bigg)[/tex]
[tex] \rm \: {f}^{ \prime} x = 5. \dfrac{d}{dx} ( {x}^{ - 1} ) + 7. \dfrac{d}{dx} ( {x}^{ - 2} )[/tex]
[tex] \rm \: {f}^{ \prime} x = 5.( - 1. {x})^{ (- 1 - 1)} + 7.( - 2. {x})^{ - 2 - 1} [/tex]
[tex] \rm \: {f}^{ \prime} x = { - 5x}^{ - 2} { - 14x}^{ - 3} [/tex]
[tex] \rm \: {f}^{ \prime} x = - \dfrac{5}{ {x}^{2} } - \dfrac{14}{ {x}^{3} } [/tex]
[tex] \rm \: {f}^{ \prime} x = - \bigg(\dfrac{5}{ {x}^{2} } + \dfrac{14}{ {x}^{3} } \bigg)[/tex]
Hense The required Derivative is answered.
Derivative Formulae:-[tex]\boxed{\begin{array}{c|c} \rm \: \underline{function}& \rm \underline{Derivative} \\ \\ \rm \dfrac{d}{dx} ({x}^{n}) \: \: \: \: \: \: \: \: \: \ & \rm nx^{n-1} \\ \\ \rm \: \dfrac{d}{dx}(constant) &0 \\ \\ \rm \dfrac{d}{dx}( \sin x )\: \: \: \: \: \: & \rm \cos x \\ \\ \rm \dfrac{d}{dx}( \cos x ) \: \: \: & \rm - \sin x \\ \\ \rm \dfrac{d}{dx}( \tan x ) & \rm \: { \sec}^{2}x \\ \\ \rm \dfrac{d}{dx}( \cot x ) & \rm- { \csc }^{2}x \\ \\ \rm \dfrac{d}{dx}( \sec x ) & \rm \sec x. \tan x \\ \\\rm \dfrac{d}{dx}( \csc x ) & \rm \: - \csc x. \cot x\\ \\ \rm \dfrac{d}{dx}(x) \: \: \: \: \: \: \: & 1 \end{array}}[/tex]
A bank account gathers compound interest at a rate of 5% each year. Another bank account gathers the same amount of money in interest by the end of each year, but gathers compound interest each month. If Abraham puts £4300 into the account which gathers interest each month, how much money would be in his account after 2 years and 5 months? Give your answer in pounds to the nearest 1p.
Answer:
$6235 1
' 1 . ' 8
Answer:
Step-by-step explanation:
A particle moves along the x-axis so that its velocity at any time t ≥ 0 is given by
v(t) = (2(pi) − 5)t − sin(t(pi))
A. Find the acceleration at any time t.
B. Find the minimum acceleration of the particle over the interval [0, 3].
C. Find the maximum velocity of the particle over the interval [0, 2].
Answer:
A. To find the acceleration, we need to take the derivative of the velocity function with respect to time:
a(t) = v'(t) = 2(pi) - cos(t(pi))
B. To find the minimum acceleration, we need to find the critical points of the acceleration function in the interval [0, 3].
a'(t) = sin(t(pi))
The critical points occur when sin(t(pi)) = 0, which means t = 0, 1, 2, 3. We need to evaluate the acceleration function at these points and at the endpoints of the interval:
a(0) = 2(pi) - cos(0) = 2(pi)
a(1) = 2(pi) - cos(pi) = pi + 2
a(2) = 2(pi) - cos(2pi) = 2(pi)
a(3) = 2(pi) - cos(3pi) = pi - 2
The minimum acceleration occurs at t = 3, with a minimum value of pi - 2.
C. To find the maximum velocity, we need to find the critical points of the velocity function in the interval [0, 2].
v'(t) = 2(pi) - cos(t(pi)) = 0
The critical points occur when cos(t(pi)) = 2(pi). We can solve for t as follows:
cos(t(pi)) = 2(pi)
t(pi) = arccos(2(pi))
t = arccos(2(pi))/pi ≈ 1.58
We need to evaluate the velocity function at these points and at the endpoints of the interval:
v(0) = -sin(0) = 0
v(1.58) ≈ 1.69
v(2) = (2(pi) - 5)(2) - sin(2(pi)) = 4(pi) - 10
The maximum velocity occurs at t = 1.58, with a maximum value of approximately 1.69.
You deposit $1000 each year into an account earning 8% compounded annually.How much will you have in the account in 10 years?
Answer:
If you deposit $1000 each year into an account earning 8% compounded annually, you will have $13,366.37 in the account in 10 years. Using the compound interest formula A = P(1 + r/n)^(nt), where A is the amount, P is the principal, r is the annual interest rate, n is the number of times the interest is compounded per year, and t is the number of years, we can calculate the amount. Plugging in the values, we get A = 1000(1 + 0.08/1)^(1*10) = $2,159.15. Therefore, the total amount after 10 years will be $13,366.37, which is the sum of the principal and the interest earned.
Given,
Annual deposit = $1000
Rate = 8% compounded annually
Time(n) = 10 year
Amount = ?
As we know the formula ,
Amount = P(1+r/100)ⁿ
Amount = 1000(1+8/100)¹⁰
Amount = 1000(1+0.08)¹⁰
Amount =1000(1.08)¹⁰
Amount = 1000 × 2.15892
Amount = $2158.92
Hence, amount in 10year will be $2158.92
please please please help i’ll give brainlist
The scale factor of PQRS to JKLM is 4/5.
The scale factor of JKLM to PQRS is 5/4.
The value of w, x, and y are 20, 12.5, and 20 respectively.
The perimeter ratio is 4:5.
What is scale factor?In Mathematics and Geometry, the scale factor of a geometric figure can be calculated by dividing the dimension of the image (new figure) by the dimension of the pre-image (original figure):
Scale factor = Dimension of image (new figure)/Dimension of pre-image(actual figure)
Substituting the given parameters into the scale factor formula, we have the following;
Scale factor of PQRS to JKLM = 15/12
Scale factor of PQRS to JKLM = 5/4 or 1.25.
Scale factor of JKLM to PQRS = 12/15
Scale factor of JKLM to PQRS = 4/5 or 0.8.
For the value of w;
15/12 = 25/w
15w = 12 × 25
w = 20
For the value of x;
15/12 = x/10.
12x = 150
x = 12.5
For the value of y:
15/12 = y/16
12y = 15 × 16
y = 20
Perimeter ratio = 12 : 15 = 4:5
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The function S=m^(2)+6m+8 models the growth of book sales in m months, where S is an amount in thousands of dollars. In how many months do book sales reach $80,000 ?
Answer:
We are given the function S = m^2 + 6m + 8 which models the growth of book sales in m months, where S is an amount in thousands of dollars. We want to find in how many months book sales reach $80,000.
We can set up an equation as follows:
S = m^2 + 6m + 8 = 80
Subtracting 80 from both sides, we get:
m^2 + 6m - 72 = 0
We can factor this quadratic equation as:
(m + 12)(m - 6) = 0
This gives us two possible solutions:
m + 12 = 0 or m - 6 = 0
Solving for m in each case, we get:
m = -12 or m = 6
Since we are looking for a number of months, we can discard the negative solution.
Therefore, book sales reach $80,000 in 6 months.
So, the answer is: 6 months.
Please help. Deeply appreciated
By using the Pythagorean theorem we know that the given triangle is not a right triangle.
What is the Pythagorean theorem?The Pythagorean theorem, sometimes known as Pythagoras' theorem, is a basic relationship between a right triangle's three sides in Euclidean geometry.
According to this statement, the areas of the squares on the other two sides add up to the size of the square whose side is the hypotenuse.
Pythagorean triples consist of the three positive numbers a, b, and c, where a2+b2 = c2.
The symbols for these triples are (a,b,c). Here, a represents the right-angled triangle's hypotenuse, b its base, and c its perpendicular.
The smallest and most well-known triplets are (3,4,5).
So, we have the values already,
Now, calculate as follows:
3² + 4² = 6²
9 + 16 = 36
25 ≠ 36
Hence, the given triangle is not a right triangle.
Therefore, by using the Pythagorean theorem we know that the given triangle is not a right triangle.
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23 x _ = 23 x 4
(help me)
Answer:
4
Step-by-step explanation:
To solve for the missing value in 23 x _ = 23 x 4, you can use the property of equality to divide both sides by 23. This will give you _ = 4. Therefore the missing value will be 4.
Hope this helped :)
Answer: the answer is 4
Step-by-step explanation: u can divide both sides with 23 and that leaves u with x=4
Rachel ran 3 miles when she was training for a race. How many feet did she run?
15,840 feet
5,280 feet
10,560 feet
14,840 feet
To convert miles to feet, we need to multiply the number of miles by the number of feet in one mile. There are 5,280 feet in one mile. So, to find out how many feet Rachel ran, we can multiply 3 miles by 5,280 feet/mile:
3 miles x 5,280 feet/mile = 15,840 feet
Therefore, Rachel ran 15,840 feet. Answer: 15,840 feet.
I couldn’t solve this and I was very confused, if anyone can please help me on this I will appreciate it, thank you so much
It is due tomorrow
no 1) what is the square root of 2? it's about 1.5
no 2) pi is 3.14 blah blahblah so just put somewhere around 3
no 3) do square root of 11, it's about 3.3 so put it a tiny bit after no 2.
all of these will be after the 0, not before because theyre positive
hope this helps x
Create a real-word mathematical problem as an equation that can be solved using all three properties
Thus, we should order two large pizzas, that will cost $22, to serve a group of 12.
What do you mean by cost?Costs in accounting are the dollar amounts paid for materials, labor, services, goods, equipment, and other purchases made for use by a company or even other accounting entity. This sum is listed as the price on invoices and is recorded as an expense of asset cost basis in bookkeeping records.
Solution:
Let x be the quantity of pizzas ordered.
12 x 2 = 24 slices are required because a large pizza contains 8 slices per slice.
As a result, the necessary quantity of pizzas is:
[tex]x\geq 3(x-1) \leq x[/tex]
In order to find the best price, we must reduce the total cost, that is determined by:
C(x) = 15x plus 5(x - 1) (x - 1) - 15
Using the cost function's derivative in relation to x, we may calculate:
C'(x) = 20 - 10[tex]/(x-1)^2[/tex]
Finding the critical points by setting the derivative to zero yields the following results:
20 - 10[tex]/(x-1)^2[/tex] = 0
Simplishing, we obtain:
[tex](x-1)^2[/tex]= 2
By solving for x using square root of the both sides, we arrive at:
x = 1 ± √2
The ideal quantity to order is two pizzas because x has to be an integer.
By adding x = 2 to the cost function, we can determine the total cost:
C(2) = 15(2) + 5(2 - 1) - 15 = 22
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[tex]65y - 147y[/tex]
Math problem.
I need help.
Answer: 82y
Step-by-step explanation:
147y - 65y = 82y
Just perform simple subtraction
The proof shows that ABCD is a rhombus. Which of the following is the
missing reason?
A. Reflective property
B. Symmetric property
C. Transitive property
D. Addition property
The correct answer is B. Symmetric property.
The symmetric property states that if a = b, then b = a. In the context of geometry, this property can be used to show that if one side of a figure is congruent to another side, then the second side is also congruent to the first. In the case of the given proof, it is possible that the symmetry of the figure is used to show that opposite sides of the rhombus are congruent.
The reflective property (A) is not typically used to prove that a figure is a rhombus, as it relates to the reflection of a figure across a line. The transitive property (C) and the addition property (D) are also unlikely to be used in this context, as they relate to the properties of equality and addition, respectively, rather than geometric properties of figures.
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How many total blocks does Ben need to walk north and east to get from his home to the playground and home again?
In a restaurant, there are 5 managers, 15 servers, 10 cooks and 15 other personnel. If a person is selected at random, what is the probability that the person is either a manager or a cook?
Answer:
0.33
Step-by-step explanation:
There are a total of 5 + 15 + 10 + 15 = 45 people in the restaurant.
The probability of selecting a manager or a cook is the sum of the probabilities of selecting a manager and selecting a cook, since these events are mutually exclusive (a person cannot be both a manager and a cook at the same time).
The probability of selecting a manager is 5/45, since there are 5 managers out of 45 people in total.
The probability of selecting a cook is 10/45, since there are 10 cooks out of 45 people in total.
Therefore, the probability of selecting either a manager or a cook is:
P(manager or cook) = P(manager) + P(cook)
P(manager or cook) = 5/45 + 10/45
P(manager or cook) = 15/45
P(manager or cook) = 1/3
So, the probability that the person selected at random is either a manager or a cook is 1/3 or approximately 0.333
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Determina analítica y geométricamente el vector que inicia en el punto P(3,3) y termina en el punto
Q(-2,2), da el vector de igual magnitud y sentido contrario al vector anterior.
After answering the presented question, we can conclude that The vector expression of equal magnitude and opposite direction to [tex]\vec{PQ}[/tex] is the same arrow but pointing in the opposite direction: QP vector
What is expression?An expression in mathematics is a collection of representations, digits, and conglomerates that mimic a statistical correlation or regularity. A real number, a mutable, or a combination of the two can be used as an expression.
Mathematical operators include addition, subtraction, rapid spread, division, and exponentiation. Expressions are often used in arithmetic, mathematics, and form.
They are employed in the representation of mathematical formulas, the solving of equations, and the simplification of mathematical relationships.
To find the vector that starts at [tex]P[/tex] [tex](3,3)[/tex] and ends at [tex]Q(-2,2)[/tex] , we can subtract the coordinates of the starting point from the coordinates of the ending point:
[tex]$\vec{PQ} = \begin{pmatrix} -2 \ 2 \end{pmatrix} - \begin{pmatrix} 3 \ 3 \end{pmatrix} = \begin{pmatrix} -5 \ -1 \end{pmatrix}$[/tex]
So the vector that starts at P(3,3) and ends at [tex]Q(-2,2) is $\vec{PQ} = \begin{pmatrix} -5 \ -1 \end{pmatrix}$.[/tex]
To find the vector of equal magnitude and opposite sense to , we can simply multiply [tex]$\vec{PQ}$[/tex] by [tex]-1:[/tex]
[tex]$-\vec{PQ} = -1 \begin{pmatrix} -5 \ -1 \end{pmatrix} = \begin{pmatrix} 5 \ 1 \end{pmatrix}$[/tex]
So the vector of equal magnitude and opposite sense to [tex]$\vec{PQ}$[/tex] is [tex]$\begin{pmatrix} 5 \ 1 \end{pmatrix}$.[/tex]
Geometrically, we can represent the vectors graphic[tex]$\vec{PQ}$[/tex]ally by drawing them as directed line segments on a coordinate plane. The vector that starts at [tex]P(3,3)[/tex] and ends at [tex]Q(-2,2)[/tex] is represented by the line segment connecting [tex]P[/tex] to [tex]Q[/tex].
Therefore, The vector of equal magnitude and opposite sense to [tex]$\vec{PQ}$[/tex][tex]$\vec{PQ}$[/tex] is represented by the line segment starting at [tex]Q[/tex] and ending at the point R, which is [tex]5[/tex] units to the right and [tex]1[/tex] unit up from [tex]Q[/tex].
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Can someone please help me!!!
The graph of f(x) is a parabola that opens downward and has a vertex at (-3/2, 3/4), while the graph of g(x) is a parabola that opens upwards and has a vertex at (-1/2, 7/4). They both intersect at the point (-3/2, -5/4).
What is vertex?Vertex is a mathematical term used to describe the point where two lines or line segments meet. It is the point of intersection for two or more lines. In a two-dimensional plane, a vertex is the point that marks the beginning and end of a line segment. In a three-dimensional plane, a vertex is the point of intersection of three or more lines. A vertex can also refer to a corner, such as the vertex of a triangle or a cube. In graph theory, a vertex is a node, or point, in a graph. Vertex can also refer to the highest point of a graph, such as the vertex of a parabola.
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Find the missing length indicated. * A) 12 C) 8 A OB D 16 24 36 B) 18 D) 15
Answer:
Is D
Step-by-step explanation:
Domain is now called the ____________ which means before a change
Answer:
Step-by-step explanation:
Domain is now called the "source" which means before a change or transformation. In mathematics, the term "source" is often used to refer to the set of all possible inputs or values that can be fed into a function or transformation, before any changes or transformations take place. The set of all possible outputs or resulting values from the function or transformation is called the "range" or "codomain".
Set up and solve a proportion for the following application problem. If 5 pounds of grass seed cover 355 square feet, how many pounds are needed for 6035 square feet?
Let x be the number of pounds needed for 6035 square feet.
We can set up a proportion between the pounds of grass seed and the square feet covered:
5 pounds / 355 square feet = x pounds / 6035 square feet
To solve for x, we can cross-multiply and simplify:
5 pounds * 6035 square feet = 355 square feet * x pounds
30175 = 355x
x = 30175 / 355
x ≈ 85.07
Therefore, approximately 85.07 pounds of grass seed are needed for 6035 square feet
You went out to dinner and your meal $22.00. If you want to leave a 20% tip, how much will you pay total?
You will pay a total of $26.40 including the 20% tip.
To calculate the total amount including the 20% tip, you need to add 20% of the meal cost to the original meal cost:
A gratuity or a small amount of money given to someone for their service, such as a waiter or a hairdresser.
A piece of advice or a suggestion given to someone to help them do something better or more efficiently.
A pointed or tapered end of an object, such as the tip of a pen or a needle.
Tip amount = 20% of $22.00 = 0.2 x $22.00 = $4.40
Total amount including tip = $22.00 + $4.40 = $26.40
Therefore, you will pay a total of $26.40 including the 20% tip.
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