nikola competed in an aquathon​ (swimming and​ running) competition. he swam at a rate of ​km/hr and ran at a rate of ​km/hr for a total distance traveled of km. if he completed the race in ​hours, how long did he take to complete each part of the​ race?

Answers

Answer 1

Nikola took 2 hours to finish the swimming part

Nikola took 4.5 hours to finish the running part

Define Algebra?

A form of arithmetic in which the rules of arithmetic are used to combine letters that represent numbers.

Calculations:

Assume,

[tex]t=time\;in\;hrs\;to\;complete\;swimming\;part[/tex]

[tex]6.5-t=time\;in\;hrs\;to\;complete\;running\;part[/tex]

[tex]d=distance\;in\;km\;that\;he\;swam[/tex]

[tex]73.5-d=distance\;in\;km\;that\;he\;ran[/tex]

Equation of swimming part,

[tex]d=3t[/tex]

Equation of running part.

[tex]73.5-d=15\times(6.5-t)[/tex]

Substitute the value of d in running part equation,

[tex]73.5-3t=15\times(6.5-t)[/tex]

[tex]73.5-3t=97.5-15t[/tex]

[tex]12t=24[/tex]

Therefore,

[tex]t=2[/tex]

[tex]Time\;to\;complete\;summing\;part=t[/tex]

[tex]Time\;to\;complete\;summing\;part=2\;hours[/tex]

[tex]Time\;to\;complete\;summing\;part=6.5-t[/tex]

[tex]Time\;to\;complete\;summing\;part=6.5-2[/tex]

[tex]Time\;to\;complete\;summing\;part=4.5\;hours[/tex]

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Related Questions

−4 3/3 − 5/3 subtract then simplify

Answers

3X=yn-2+(9) EHEHEHEHEHEHEHEH

The formula d = 16t to the second power describes the number of feet d a skydiver falls in t seconds of free fall assuming there is not air resistance. How far does a skydiver fall between the third and fourth seconds?

Answers

Answer:

D=16(3)

=48 feet

D=16(4)

=64 feet

The distance between third and fourth second=64 feet-48 feet

=16 feet

George is making a peperoni pizza using a circular pan with a 14-inch diameter. What is the area
of the pizza that George will cover with sauce?

Answers

The area of the pizza that George  is 153.938040026 [tex]inch^{2}[/tex].

What is area?

The area of the pizza that George is [tex]\pi r^{2}[/tex]

area = [tex]\pi[/tex]×[tex]7^{2}[/tex] = 153.938040026 [tex]inch^{2}[/tex]

The number of unit squares that are equivalent in size to the surface, which is included inside a set of lines; see Metric System Table, Weights and Measures Table.

The extent of a notion, action, or activity: the entire realm of international policy.

The measurement that expresses the size of a region on a plane or curved surface is called area. Surface area refers to the area of an open surface or the boundary of a three-dimensional object, whereas the area of a plane region or plane area refers to the area of a form or planar lamina.

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question 4(multiple choice worth 1 points) (01.02 mc) bruno solved the following equation: 4x (10x − 4)

Answers

The justifications are 1. Distributive Property 2. Combine like terms 3. Addition Property of Equality 4. Division Property of Equality (Option 3 and 4).

What is a linear equation?It is described as the relationship between two variables, and a straight line results from plotting the graph of the linear equation.The equation is referred to as a linear equation in one variable if just one variable is contained in the equation.

Now,

We are given the linear equation: [tex]4x + \frac{1}{2}(10x-4)=6[/tex]

4x + 5x -2 = 6 (Distributive property)9x - 2 = 6 (combining the like terms)9x = 8 (additive property of equality)x = 8/9 (division property of equality)

Hence, The third and fourth solutions are correct when using the division property of equality, i.e., The justifications are 1. Distributive Property 2. Combine like terms 3. Addition Property of Equality 4. Division Property of Equality (Option 3 and 4).

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help me understand this

Answers

Answer:

59,049

Step-by-step explanation:

Since 3^2 is basically 3 times 3 which is 9, then what's 9 times 9, 9, 9, 9, 9 (9^5)?

Answer: 3¹⁰

Step-by-step explanation:

[tex]\displaystyle\\(3^2)^5=\\\\3^{2*5}=\\\\3^{10}[/tex]

multiple choice question. with explanation

Answers

Answer:

(1)

Step-by-step explanation:

the sum of the 3 angles in a triangle = 180° .

consider the inner triangle where

a + b + 58° = 180° ( subtract 58° from both sides )

a + b = 122°

consider the outer triangle where

c + d + 63° = 180° ( subtract 63° from both sides )

c + d = 117°

Then

a + b + c + d = 122° + 117° = 239°

Solve the absolute value equation - 5 | x + 1 | + 2 = 12 if there is no solution, state no solution

Answers

Answer:

Let's solve your equation step-by-step.

−5(|x+1|)+2=12

Step 1: Add -2 to both sides.

−5(|x+1|)+2+−2=12+−2

−5(|x+1|)=10

Step 2: Divide both sides by -5.

−5(|x+1|)

−5

=

10

−5

|x+1|=−2

Step 3: Solve Absolute Value.

|x+1|=−2

No solutions. (Absolute value cannot be less than 0.)

Step-by-step explanation:

must first specify a coordinate system in order to find the components of each arrow.) this problem gives you some practice with the components. let vectors a⃗

Answers

The calculated vectors are:

[tex]\vec{A}-\vec{B}[/tex]=(3,-5,-4)

[tex]\vec{B}-\vec{C}[/tex]=(-5,4,0)

[tex]-\vec{A}+\vec{B}-\vec{C}[/tex]=(-6,4,3)

[tex]3 \vec{A}-2 \vec{C}[/tex]=(-3,-2,-11)

Calculate the following, and express your answers as ordered triplets of values separated by commas.?

Generally, the equation for is  mathematically given a

[tex]\vec{V}+\vec{W}=\left(V_1, V_2, V_3\right)+\left(W_1, W_2, W_3\right)\\\\\vec{V}+\vec{W}=\left(V_1+W_1, V_2+W_2, V_3+W_3\right) \text { }[/tex]

[tex]\vec{V}-\vec{W}=\left(V_1, V_2, V_3\right)-\left(W_1, W_2, W_3\right)\\\\\vec{V}-\vec{W}=\left(V_1-W_1, V_2-W_2, V_3-W_3\right)[/tex]

[tex]\alpha \cdot \vec{V}=\alpha \cdot\left(V_1, V_2, V_3\right)\\\\\alpha \cdot \vec{V}=\left(\alpha \cdot V_1, \alpha \cdot V_2, \alpha \cdot V_3\right)[/tex]

[tex]\vec{A}-\vec{B}=(1,0,-3)-(-2,5,1)\\\vec{A}-\vec{B}=(3,-5,-4) \\\\&\vec{B}-\vec{C}=(-2,5,1)-(3,1,1)\\&\vec{B}-\vec{C}=(-5,4,0) \\\\&-\vec{A}+\vec{B}-\vec{C}=-(1,0,-3)+(-2,5,1)-(3,1,1)\\-\vec{A}+\vec{B}-\vec{C}=(-6,4,3) \\\\&3 \vec{A}-2 \vec{C}=3(1,0,-3)-2(3,1,1)\\3 \vec{A}-2 \vec{C}=(3,0,-9)-(6,2,2)\\3 \vec{A}-2 \vec{C}=(-3,-2,-11)[/tex]

In conclusion,

[tex]\vec{A}-\vec{B}[/tex]=(3,-5,-4) [tex]\vec{B}-\vec{C}[/tex]=(-5,4,0) [tex]-\vec{A}+\vec{B}-\vec{C}[/tex]=(-6,4,3) [tex]3 \vec{A}-2 \vec{C}[/tex]=(-3,-2,-11)

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CQ

In general it is best to conceptualize vectors as arrows in space, and then to make calculations with them using their components. (You must first specify a coordinate system in order to find the components of each arrow.) This problem gives you some practice with the components. Let vectors A rightarrow = (1,0, -3), rightarrow = (-2,5,1), and C rightarrow = (3,1,1). Calculate the following, and express your answers as ordered triplets of values separated by commas.

A study was performed with a random sample of 513 bolts produced at one factory. What population would be appropriate for generalizing conclusions from the study, assuming the data collection methods used did not introduce biases?.

Answers

Given that the study was conducted using a sample of 513 bolts produced at a single facility when there is no bias resulting from data gathering procedures, broad inferences may then be drawn.

All bolts manufactured by that factory would be covered by the conclusion?

Due to the fact that bolts made in the same factory will follow the results of an analysis of a sample made up of bolts from the same factory. The finding or conclusion would therefore be applicable to all bolts produced in the same factory because the environment for experimentation and production is the same there while it may differ in other factories. Conclusions from the study may not apply to the bolts made by other companies as a result of this bias.

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Which table shows a function that is decreasing only over the interval (–1, ∞)?

Answers

Answer:

The 4th option.

Step-by-step explanation:

f(x) is increasing from x = -3 to x = -1 then it starts to decrease as x increases.

Please can you answer this for me, I will mark you as the brainliest

Answers

Answer:

Area of the shaded region is 53.47 square yd

In the language of functions, all of the following are true except one. Identify the false statement.

The dependent variable (output) is a function of the independent variable (input).

The phrase DEPENDENT VARIABLE means output.

The phrase INDEPENDENT VARIABLE means input

The input is determined by the output

Answers

1........answe is 1............

seven times the quantity of the difference of a number cubed and eleven
write into algebraic expression

Answers

Answer:

7x(y^3-11)

Step-by-step explanation:

how are the cards and the proportional relationships useful for determining the diameter of the sun?

Answers

This investigation's goal is to demonstrate how quickly and easily we can determine the diameter of the sun using basic geometry.

How to determine the diameter of the sun?

The cards must remain parallel and separated by a predetermined amount. Then, a tiny hole must be cut on one card so that sunlight can pass through and create the sun's picture on the other card. We base the formula described above on the diameter of this photograph of the sun. The diameter of the sun's picture on the card is now measured because we can choose the distance between the cards, and we already know that the sun is nearly 150 million kilometers away from the earth. i.. e. Since three of the values are known, we can use the technique above to determine the fourth unknown quantity and measure the diameter.

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how to solve this with steps?

Answers

Answer:

its at simplest form

Step-by-step explanation:

Answer:

6x + 9 = 75

explantion : in the photo just writing this so brainly could let me post the picture but here you go

An opaque bag contains 22 yellow marbles and 11 teal marbles. if two marbles are randomly chosen from the bag at the same time, find the probability that both marbles are teal. round your answer to four decimal places.

Answers

If two marbles are randomly chosen from the bag contains 22 yellow marbles and 11 teal marbles, then the probability that the both marbles are teal is [tex]\frac{10}{99}[/tex]

Given,

The number of yellow marbles = 22

Number of teal marbles = 11

Total number of marbles = 22+11= 33 marbles

Then two marbles are chosen randomly

We know,

The probability = Number of favorable outcomes/ Total outcomes

Probability that first marble is teal =[tex]\frac{11}{33}[/tex]=[tex]\frac{1}{3}[/tex]

Probability that second marble is teal =[tex]\frac{10}{33}[/tex]

Here we are considering without replacement

Then the probability that both marbles are teal = [tex](\frac{1}{3})(\frac{10}{33})=\frac{10}{99}[/tex]

Hence, if two marbles are randomly chosen from the bag contains 22 yellow marbles and 11 teal marbles, then the probability that the both marbles are teal is [tex]\frac{10}{99}[/tex]

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An automobile purchased for $37000 is worth $2600 after eight
years. Assuming that the value decreased steadily each year,
what was the car worth at the end of the fifth year?

Answers

The car has a value of $ 15 500 at the end of the fifth year.

What is the value of a car in time?

In accordance with the statement, the value of an automobile decreases in time and decreases steadily. A stead decrease means that the value decreases linearly in time, whose formula is shown below:

C' = C + r · t         (1)

Where:

C - Initial value of the car, in dollars.C' - Final value of the car, in dollars.r - Decrease rate, in dollars per time.t - Time.

If we know that C = $ 2 600, C' = $ 37 000 and t = 8, then the value of the car at the end of the fifth is:

r = (C' - C) / t

r = (2 600 - 37 000) / 8

r = - 4 300

t = 5

y = 37 000 - 4 300 · 5

y = 15 500

The car has a value of $ 15 500 at the end of the fifth year.

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a scientist measured the weights (in grams) of 11 female guinea pigs (cavia porcellus) and got the following: 582 904 311 410 688 541 470 709 525 478 402 calculate the iqr

Answers

278 is the value of IQR.

What do we mean by IQR?The interquartile range (IQR) is a way of measuring statistical dispersion, or the spread of data, in descriptive statistics. The IQR is also known as the midspread, the middle 50%, the fourth spread, or the Spread. It is defined as the difference between the data's 75th and 25th percentiles. To calculate the interquartile range (IQR), first, compute the median (middle value) of the data's lower and upper halves. These are quartile 1 (Q1) and quartile 3 (Q3) values (Q3). The IQR is the distinction between quarters three and one.

To find the IQR:

Arrange in ascending order as follows:

311, 402, 410, 470, 478, 525, 541, 582, 688, 709, 904

The middle value or the median is 525.

IOR = Q₃ - Q₁

Q₁ from the lower half is 410 and Q₃ from the upper half is 688.

So, IOR = 688 - 410 = 278

Therefore, the value of IQR is 278.

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In a 5000 m race on a 400 m track, each athlete must run 12 ½ laps. kara runs the race at a constant pace and finishes in 17.5 min, while hannah runs at a faster pace and finishes 15.3 min. in fact, hannah ran fast enough that she passed kara during the race. how many laps had hannah run when she caught and passed kara?

Answers

Hannah had run 6 complete laps and is running the 7th lap when she surpasses the athlete Kara.

Who is an athlete?

An athlete (sometimes known as a sportsman or sportswoman) is a person who participates in one or more sports that require physical stamina, speed, or strength.

Professional and amateur athletes both exist. The majority of elite athletes have extremely well-developed bodies because to rigorous physical training, stringent exercise, and a tight food regimen.

Isotonic exercisers had a greater mean left ventricular end-diastolic capacity and are less prone to experience depression. Athletes are far more prone than the general public to go to massage parlors and pay for the services of massotherapists and masseurs due to their demanding physical activity. Athletes whose sport favors endurance over strength typically consume less calories than other athletes.

Calculations:

Total length of the race (L) = 5000 m

Time taken by Kara (tk) = 17.9 min = 1074 s

Kara's speed (vk) = L/tk = 5000/1074 m/s

Time taken by Hannah (th) = 15.3 min = 918 s

Hannah's speed (vh) = L/th = 5000/918 m/s

Let the number of laps Hannah had run when she passes Kara be n

Distance travelled by Hannah in this time = n*400 = 400n meters

Time taken by Hannah to run n laps = 400n/(5000/918)=367200n/5000=73.44n

Distance travelled by Kara in this time = (n-1)*400 = 400n - 400 meters

Time taken by Kara to run (n-1) laps = (400n-400)/(5000*1074)=(429600n-429600)/5000=85.92n-85.92

= 85.92n - 85.92 = 73.44n

= 12.48n = 85.92

= n = 6.88

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Margaret drove to a business appointment at 70 mph. Her average speed on the return trip was 60 mph. The return trip took 1/3 hr longer because of heavy traffic. How far did she travel to the appointment?​

Answers

Answer:

70t = 60t + 10

10t = 10

t = 1 hour

----------

1 hour  70 mi/hr = 70 miles

Step-by-step explanation:

suppose that mean retail price per gallon of regular grade gasoline is with a standard deviation of and that the retail price per gallon has a bell-shaped distribution. note: please use empirical rule approximations for this problem.

Answers

68.26 % of regular gasoline sold between $ 3.25 & $ 3.65.

What do you mean by the term standard deviation?

The term "standard deviation" (or "") refers to a measurement of the data's dispersion from the mean. A low standard deviation implies that the data are grouped around the mean, whereas a large standard deviation shows that the data are more dispersed. In contrast, a high or low standard deviation indicates that the data points are, respectively, above or below the mean. A standard deviation that is close to zero implies that the data points are close to the mean. the curve at the top is more dispersed and has a greater standard deviation than the curve at the bottom, which is more concentrated around the mean and has a lower standard deviation.

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A recipe requires 11 pints of water. How many fluid ounces of water are in 11 pints of water?​

Answers

I think its 176 fluid ounces

Pleas help me it would be so nice

Answers

Answer:

1. 0.003

2. 0.5

3. 0.001343

4.0.05003

5. 0.670570

6. 1.01


The larger bag of ferret food is on sale at the SuperPetMart
for $89. Ferroza made the following table. Explain to
Ferroza why the cost of food at SuperPetMart is not a
proportional relationship.
Ferret Food
Weight
(pounds)
0
5
30
Cost
($)
$0
17.50
89

Answers

Relationships that have a uniform or constant rate are said to be proportional relationships. Because it does not employ a uniform rate, the price of food does not follow a proportional connection.

The missing table looks like this:

Bag     cost

0           0

5          17.5

30        89

First, we calculate the slope (m) of the table using:

(x₁ y₁) = (0,0)

(x₂ y₂) = (5,17.5)

m₁=(y₂-y₁)/(x₂ -x₁)

m₁=(17.5-0)/(5-0)

m₁=3.5

The slope for the following points

(x₁ y₁) = (0,0)

(x₂ y₂) = (30,89)

m₂=(y₂-y₁)/(x₂ -x₁)

m₂=(89-0)/(30-0)

m₂=2.97

3.5 ≠2.97

Hence, the cost of food is not a proportional relationship because it does not use a uniform rate.

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v = u + at
u = 2 a = -7 t = 0.5
whats v

Answers

Answer:

A= 3. 5 u=7 t=0.5

Step-by-step explanation:

It will be 8.75

solve the equation 6x = 12​

Answers

6x=12
Divide both sides by 6
x=2

Answer: x=2

Step-by-step explanation:

[tex]6x=12[/tex]

[tex]\frac{6}{6}x=\frac{12}{6}[/tex]

[tex]x=2[/tex]

Joe has a mullet ratio of 1.5 (a) Find 2 possibilities for his hair lengths.​

Answers

Mullet ratio of 1.5 is 1.8

Given:

The mullet ratio is 1.5

Rm=[tex]\frac{party}{buisness}[/tex]

Rm = 17/9

Rm=1.8

The ratio to their Mullet and several other higher-level extension questions.

Trimmed short in the front and sides, but left wild and long in the back. Mullet begins the experience with intuition, the lowest rung on the ladder of abstraction, asking students to decide using nothing more than their gut “which one is more Mullet-y” By the end, they’ve named variables and defined operations, entirely abstracting the context.

The pipe cleaner was inserted along the hair, and the students straightened it on their rulers to determine the size of the Party. The Business was often rather honest.

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Find these common multiple for five and nine

Answers

Answer: 45

Step-by-step explanation:

The LCM of 5 and 9 is 45. To find the least common multiple of 5 and 9, we need to find the multiples of 5 and 9 (multiples of 5 = 5, 10, 15, 20 . . . . 45; multiples of 9 = 9, 18, 27, 36 . . . . 45) and choose the smallest multiple that is exactly divisible by 5 and 9, i.e., 45.


ABC = 40° and
x
= 9 cm.
Find the length of AC.
Give your answer rounded to 1 DP.

Answers

The length of AC is 6.228 cm.

Here the angle of the triangle ∡ABC is 40°, AB = BC = 9.

We have to find the length of AC which is opposite to ∡B.

Let AB = BC = x , AC = c

From the cosine formula, we know that

[tex]c^{2}[/tex] = [tex]a^{2}[/tex] + [tex]b^{2}[/tex] - 2ab cos α

Here c is the length of the side opposite to the angle α, and a, b is the side adjacent to the angle α.

So from the cosine formula we have

[tex]c^{2}[/tex] = [tex]x^{2}[/tex] + [tex]x^{2}[/tex] -2[tex]x^{2}[/tex]cos α

[tex]c^{2}[/tex] = 2[tex]x^{2}[/tex] - 2[tex]x^{2}[/tex] cos 40°

   = 2[tex]x^{2}[/tex](1- cos 40°)

   = 2 ×[tex]9^{2}[/tex] ( 1 - 0.76)

    = 2 × 81 × 0.24

c = 2 × 9 × 0.2×√3

  =3.6 × 1.73

  = 6.228cm

Therefore the length of the side AC is 6.228cm.

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Write the equation of the given circle.
center at origin, d=12

Answers

Do you have a of the problem that we can look at hope this helps
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