Unit 4 Solving Quadratic equations {and complex number}

Answers

Answer 1
1.) a=5, b=9, c=-4
2.) C
3.) No solution
4.) x=-2, x=1.25
5.) x=-9, x=3
6.) quadratic formula
7.) 2
8.) 11cm by 16cm

Related Questions

solving for G

goal is to isolate the variable by undoing in the reverse of the order of operation.

4=2(3g+2)

Answers

Answer:

g = 0

Step-by-step explanation:

4 = 2(3g + 2) ← divide both sides by 2

2 = 3g + 2 ( subtract 2 from both sides )

0 = 3g , then

g = 0

Find x, y

Please try to explain how you did it

Answers

I believe this is scale factor? SF=new/old. 10/8= a scale factor of 1.25 (the image gets 1.25x bigger). To find x, multiply 5 by 1.25 and subtract the original length of 5 (you subtract this length because x is only the value of the new part of the triangle). X=6.25-5, X=1.25. Try to find y yourself using this scale factor. (Brainliest would be appreciated)

What is the slope of this line?


a.−23

b.−13

c.13

d.23

Answers

Answer:

D

Step-by-step explanation:

I think you meant to put the answers as a fraction

Answer:

if there were slashes in between every answer, the answer would be

D. 2/3

Step-by-step explanation:

m = y2-y1 / x2-x1  (slope formula)   ⋅the two points i used were: (0,-3) and (3,-1)

m = -1-(-3) / 3-0 (plug in the points)

m = -1+3 / 3-0

m = 2/3 (Simplify to get your answer)

What is log Subscript 5 Baseline (4 times 7) + log Subscript 5 Baseline 2 written as a single log?

Answers

log5(4*7)+log5(2)=log5(28)+log5(2)=log5(56)

Answer:

Its D

Step-by-step explanation:

just took the test

Help help help math math

Answers

Answer:

Yes, it is a function

Step-by-step explanation:

A function is determined if each input, or x-value has 1 unique output, or y value. No x-value has more than 1 output here, so it is a function

MODELING REAL LIFE A charm bracelet costs $65, plus $25 for each charm. The equation -25x+y=65 represents the cost y (in dollars) of the bracelet, where x is the number of charms.

a. Graph the equation.

b. How much does a bracelet with three charms cost?

Answers

Answer:

B = $140

Step-by-step explanation:

for part A, the graph is linear line with a Y intercept at (0,65) so this means that if you were to have no charms it would cost 65 dollars, since the y axis represents cost. then for every 1 increment on the x axis (number of charms) the Y value increases by 25 so the slope is [tex]\frac{25}{1}[/tex]

we also can conclude that there is no negative domain since you cannot have negative charms, and the range begins at 65 since you cannot get a bracelet for less money

for part B, y=25x+65

so for three charms, x is represented as 3 so y=25(3) +65 which is 75+65=y= $140

A researcher at the Centers for Disease Control and Prevention is studying the growth of a certain bacteria. He starts his experiment with 200 bacteria that grow at a rate of 2% per hour. He will check on the bacteria every 7 hours. How many bacteria will he find in 7 hours? Round your answer to the nearest whole number.

Answers

The population of the bacteria after 7 hours is 230 bacteria.

An exponential function is given by:

y = abˣ

where y, x are variables, a is the initial value of y and b is the multiplier.

Let y represent the population of bacteria after x hours.

Given that he starts his experiment with 200 bacteria, hence

a = 200

The bacteria grow at a rate of 2% per hour, hence:

b = 100% + 2% = 1.02

The exponential equation becomes:

y = 200(1.02)ˣ

After 7 hours:

y = 200(1.02)⁷ = 230

The population of the bacteria after 7 hours is 230 bacteria.

Find out more at: https://brainly.com/question/12490064

Pls help I’ll brainlest ASAP

Answers

To find the slope, you divide the difference of the y-coordinates of 2 points on a line by the difference of the x-coordinates of those same 2 points.
2 / 3 = 0.7 i think

41% of what number is 77

Answers

Answer: 31.57

Step-by-step explanation:

41% of 77 is what?

41% of 77 is Y

Equation: P% * X = Y

Solving our equation for Y

Y = P% * X

Y = 41% * 77

Converting percent to decimal:

p = 41%/100 = 0.41

Y = 0.41 * 77

Y = 31.57

The sum of the first 15 terms of a geometric sequence with 7 as the first term and a common ratio of -3 is __________.

Answers

Step-by-step explanation:

the formula for the sum of the first n terms of a geometric sequence is

Sn = s1(1 - r^n)/(1 - r)

with r being the common ratio and s1 is the first term.

so,

S15 = 7×(1 - (-3)¹⁵)/(1 - -3) = 7×(1 - -14,348,907)/4 =

= 7×14,348,908/4 = 7×3,587,227 = 25,110,589

6:4 is equivalentto blank:24

Answers

24/4=6 so we must do 6x6=36. The final answer is 36:24

The owner of a local shop made a list of how much she pays her employees by the hour.




Which measure of central tendency would the store owner use if she wanted to argue that the employees are paid well?

A. the mean
B. the median
C. the mode
D. the range
GIVING BRAINLIST

Answers

Answer: The answer is D

Step-by-step explanation:

I took the quiz

Help me solve this please

Answers

Answer:

2/5-1/10 = 3/10

1/5+7/10 = 9/10

Step-by-step explanation:

4/10-1/10 = 3/10

2/10+7/10 = 9/10

- Draw A' the symmetric of A with respect to point O

- Draw A' the symmetric of A with respect to (d) ​

Answers

Answer:

how am i supposed to answer this? draw a line lol

Step-by-step explanation:

Please help me understand how I would pick the correct formula for step 1 for the question in the image? I am really confused.

Answers

Answer:

The first option

Step-by-step explanation:

We are doing height above shadow height. Since the telephone poll is 40 feet high with a 32 feet shadow, it is 40/32. We know the sign casts a 12 1/2 shadow, so this will be our denominator. h is our unknown, so we will have h / 12 and a half as our second fraction for our ratio.

Have a nice day!

     I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)

- Heather

in 2011 i sold 105276 tickets.
This is 7% less then the number of tickets i sold in 2018.

How many tickets i sell in 2018?

And

Show a check of your answer.

Answers

Answer:

sorry I don't know the answer of this

I need help on this question

Answers

Answer:

Go download CameraMath on playstore

7 x [(7 + 7) = 7
Help plz

Answers

Answer:

[tex] \frac{1}{14} [/tex]

Step-by-step explanation:

7 x (7+7)=7

7x [(14)]=7

x=

[tex] x = \frac{1}{14} [/tex]

A fair coin is tossed (heads or tails) 9 times. What is the probability that the coin will land “heads” exactly 3 out of the 9 times?

Answers

Answer:

Step-by-step explanation:

The total number of tosses is 9

The number of successes is 3

P(heads 3 times ) = 3/9

P(heads 3 times) = 1/3

Help fast !!! I have like 5 minutes left

Answers

Answer:

y-intercept = (0,3)

Step-by-step explanation:

Distributive property to remove parentheses 4(3+w)

Answers

Answer:

12+4w

Step-by-step explanation:

Multiply 4 by both sides

Marcus sleeps 60 hours a week this is 5 times as many hours as he plays chess. How many hours a week does Marcus play chess?

Answers

Answer: 12 hours a week

Step-by-step explanation:

60/5 = 12

Since he plays chess 5 times the amount of time he sleeps, simply divide the amount of time he sleeps by 5.

Correct me if I am incorrect.

3a+5=20 steps on paper

Answers

Answer:

5

Step-by-step explanation:

3a+5=20 -5

3a=15 /3

a=5

The variables x and y are directly
related. When x=15, y = 6. What is the
value of x when y = -4?

Answers

Answer: When y = -4, x = -10.

Explanation:
The equation for direct variation is y = kx^n, where k is the constant of variation. n is the exponent above the x value, but since this problem doesn’t involve exponents greater than one, we can ignore it.

First, find k.
y = kx
6 = k*15
k = 6/15 or 2/5

Now, we can solve for any x or y input. Let’s find x when y = -4.
y = kx
-4 = 2/5 * x
(to cancel out the fraction, multiply each side of the equation by its reciprocal, 5/2)
x = -4 * 5/2
x = -20/2
x = -10

florida sales tax is 7%. How much money comes out of your pocket if u buy something for $100

Answers

Answer:

$7

Step-by-step explanation:

If you use "Is over of" the equation will be ?/100*7/100, therefore after simplifying your answer is $7

Brainliest would be appreciated! :-)

The answer you are looking for the Florida tax for $100 is 7$

Does a quadratic polynomial have a degree of to

Answers

Answer:

Idioet duh it does.

Step-by-step explanation:

11)
Given the function, f(x) = x2 + 5x - 3 evaluate f(-2).

Answers

Answer:

f(- 2) = - 9

Step-by-step explanation:

Substitute x = - 2 into f(x) , that is

f(- 2) = (- 2)² + 5(- 2) - 3 = 4 - 10 - 3 = 4 - 13 = - 9

Justin is buying tickets to a concert online from Ticketmaster. He buys 3 tickets that all have the same price.
There is also a service charge, since he is buying it from Ticketmaster, for $5 per ticket. The total cost of his
order was $138.

Answers

Answer:

I don't know if your asking for the price for each ticket, but if you are, it's $41 each.

Step-by-step explanation:

5 x 3 = 15(price of the service charge)

138 - 15 = 123(price with out service tax)

123/3 = 41

Hope this was helpful

a. Morning rain showers dropped 1/3 of an inch of rain. Later that day, another storm passed through and dropped 1/8 inch of rain. How much more rain fell in the morning than in the afternoon?

Answers

Answer: 5in

Step-by-step explanation:

1/3x8/8=8/24

1/8x3/3=3/24

8-3=5

Solve.

Write an expression for the total cost (in dollars) of Sam's purchase if he buys x candies costing 39 cents each and y bars of chocolate cost $1.25 each.


a. (0.39 + x) ∙ (1.25 + y)

b. 0.39x + 1.25y

c. 1.64(x + y)

d. 39x + 1.25y

Answers

Answer:

the answer to the question is c

Other Questions
2d +9= 19The solution is d = The minutemen were well-trained professional colonial soldiers.TrueFalse True or False: Almost every innovative technology today is the product of an organizational network.True or False: Innovation refers to the successful introduction of a technology to the market or to the first successful military utilization of a technology.True or False: According to organizational change expert Barbara Eilert, inclusion of cross-functional teams ensures success in organizational change initiatives.True or False: In contrast to millennials, the "iGen" is defined by the rejection of social media.True or False: The Fourth Industrial Revolution has been characterized as "the digital economy," marked by increasingly automated systems.True or False: Culture is not inheritable or genetic; culture is learned.True or False: The less hierarchically organized a company is, the greater the "power distance" among the actors within it (i.e., hierarchical organization is inversely related to power distance).True or False: An individual can be part of only one subculture at any given time.True or False: As described by Aihwa Ong, factory women in Malaysia resisted exploitation through a broad-based unionization movement.True or False: The term "cultural cluster" refers to a group of countries that share many cultural similarities.True or False: Language is a system of reference.True or False: An organizational mission statement can be used as an indicator of organizational identity.True or False: Organizational failure was identified as the principal reason for the Columbia disaster.1PUBP 503-DL1, Fall 2021 Review QuestionsTrue or False: "Keiretsu" is a South Korean term referring to horizontal organizational networks built around a large specialized corporation.True or False: Digital surveillance is a foundation of todays "smart and connected" world.True or False: Winner is concerned not only with technological change, but also with how that change might affect such things as the economy, the environment, and the culture of a place.True or False: Change in technology is now so rapid and complex that it is impossible to know all of its causes and effects.True or False: As a socio-structural concept, community is always an expression of inclusion and diversity.True or False: In any given organization, the management style generally can be expected to reflect the broader economic culture in which the organization is embedded.True or False: According to Schein, cultural intelligence requires sensitivity and mindfulness, and the flexibility to learn new skills.True or False: In general, given advances in and greater reliance on technology, accidents are unlikely to occur.True or False. Cybersecurity has been described as the organization and collection of resources, processes, and structures to protect cyberspace and related systems from occurrences misaligning de jure from de facto property rights.True or False: A shared value system has been identified as a major hindrance to having a stable, functioning society.True or False: Technology is always advantageous or beneficial to society.True or False: Some transnational corporations have more economic clout than many countries.True or False: Financial capital is a tangible form of assets used for investment.True or False: Adam Smith was a famous American economist who spoke of the invisible hand that divides market from non-market forces.True or False: Radio and television were military innovations before becoming commercially successful entertainment media.True or False: In regard to the growth of digital libraries, a principal benefit is greater access.True or False: Digital platforms operate to streamline and facilitate communication and flows between economies. 2. A high school wants to double the size of its parking lot by expanding the existing lot asshown below. By what distance should the lot be expanded?x ftkin75ftold parking lot165ftschool300 Ft75 ft xft a package arrives at your house, but you didn't order anything. Write about what happens next. When it is not stated, one of the best ways to figure out a story's theme is to examinea. elements of the author's stylec. the writer's lifeb. the settingd. how the main character changes 20 points to anyone willing to help Abdul works as a regulator at the Bureau of Consumer Protection. His agency makes sure that consumers are treated fairly. What task might be part of Abdul's job at his agency?Question 6 options:drawing up ideas for the new city parkdrafting a proposal for the state government budgetrecording information about a fraudulent businessmeeting with heads of state to discuss trade X-2y=2 in slope intercept form FOOTBALL Tyrell plays running backand kicks field goals for his team. Hescores 6 points for a touchdown and3 points for a field goal. In his lastgame, he scored 24 points. This can berepresented by the function6x + 3y = 24. Find the x- andy-intercepts. Interpret the x- andy-intercepts.= Ovulation occurs in response to the release of an anterior pituitary hormone known as ________ hormone. x varies directly with y. If x is 108 when y is 180, find x when y is 150. organisms that belong to the same ___ are most closely related. Plzzzz help I REALLY NEED HELPWrite a division problem with 1/3 as the dividend 3 as divisor. The find the quotient. PLEASE HELP. I'LL GIVE BRAINLIEST!!!Mike purchased a car worth $18,000 in the year 2008. It loses its value by 6% per year. What is the value of the car in 2020? Round your answer to the nearest whole dollar, and do not enter any decimals or commas. convert the following equation into standard form. y= -5x/6+2 48.36g.MgSO4 to motes An 50 kg student runs and jumps onto a 25 kg tire swing, which is initially at rest, and rides the swing up into the air. The swing (and the student) then rises a vertical distance of 1.5 m. What was the initial speed, in m/s of the swing? Remember the acceleration due to gravity near Earth's surface, g = 9.81 m/s^2A. 29 m/sB. 5.4 m/sC. 1.7 m/sD. 15. m/sE. 3.8 m/sWill mark brainliest how is congress affected by redistricting? What is the slope of this line?Enter your answer as a whole number or a fraction in simplest form in the box. can you answer this?