Mathematics High School

the zeros of a quadratic function are –7 and 3. Which of the following could be the function? Select all that apply:
f(x)=x^2+4x-21
f(x)=x^2-4x-21
f(x)=2x^2-8x-42
f(x)=5x^2+20x-105

Answers

Answer 1

Step-by-step explanation:

f(x) = (x+7)(x-3)

= x²+4x-21 ... (option A)

Answer 2

Answer:

First option: f(x)=x^2+4x-21

AND

Fourth option: f(x)=5x^2+20x-105

Step-by-step explanation:

All you have to do is do the quadratic equation backwards

If the zeros are x=-7 and x=3, the equation would look like ->

(x+7)(x-3)

Now distribute it

x(x-3)+7(x-3)

x^2-3x+7x-21

x^2+4x-21

The Fourth option is also correct. Just divide the whole equation by 5 and you will get the same exact equation as the first option.  

Related Questions

What is the area of the shaded section?

Answers

Answer:

270cm squared

area of shaded part rectangle is 180

are of triangle is 48 and 42 respectively you add the three to get 270

Marking brainliest...

Answers

Answer:

C. 12

Step-by-step explanation:

Find the percentage of him drawing a blue marble.

4/10 = 0.4

He has a 40% chance of picking blue.

Find 40% of 30.

12

He would draw a blue marble around 12 times.

Answer:

C

Explanation:

So in the bag, there are 10 marbles, and 4 of them are blue, so if he drew from the bag 10 times, we can assume the fraction:

4/10

Next, we see that the denominator, or the number times Cade is drawing from the bag is 30, which makes us multiply most sides of the fraction by 3:

12/30

So I would say 12/30, but again, he wouldn't draw a blue exactly 4 times, and it may be more or less, so either 8/12....

Hope this helps!

A triangle has a base that measures 14 inches.
The area of the triangle is 3.5 square inches.
What is the height of the triangle?



Answers

The answer to the question is 0.5

Find the Area of this shape, please.

Answers

Answer:

149cm^2

Step-by-step explanation:

big brain

Answer:

114cm²

Step-by-step explanation:

Okay, so you can split this thingy up into a rectangle and another rectangle, so that's what we're going to do (see pic below)

So now we take off that 7 from the 13:

13 - 7 = 6

So now we find the area of that little area:

6 x 5 = 30

Now we do the other rectangle:

12 x 7 = 84

Now we add them together:

84 + 30 = 114

So the area of the shape is 114cm²

hope this helps:)

Please help me with this problem.

Answers

I believe I’m correct but I think the answer is 45 simplified

The two lines graphed below are parallel. How many solutions are there to the system of equations?

Answers

Answer:

C. Zero

Step-by-step explanation:

The solution of the system of equations would be the point where they intersect, but since these lines are parallel, they will never intersect, so therefore there are zero solutions.

for brainiest:):):):):):):)

Answers

Answer:

8. Yes

9. No

12. No

13. Yes

Step-by-step explanation:

all angles in quadratics must be equal to 360 degrees

please include explaination ​

Answers

Answer:  104 i think is your answer hope this helped

plz make brainly

Step-by-step explanation:

9x^6 + 35x(3/52.5)= 569

Answers

Answer:

x = 1.99359

Step-by-step explanation:

Answer: x  ≈  −  1.99825808  ,  1.99359054

Step-by-step explanation:

What single decimal multiplier would you use to increase by 5% followed by a 15% increase?​

Answers

Answer:

Answer: 1.26 is the single decimal multiplier.Oct 7, 2019

Somewhere around in briany there was i think smilier or the same question this so this might aswell e the answer.  

Step-by-step explanation:

A recipe requires & cup of oil for every cup of water. How much oil (in cups) is
needed per cup of water?

Answers

Answer:

the answer is one cup of oil for each cup of water. hope this helps!

Plz help I have a geometry exam soon!!!!! :(

Answers

Answer:

a = 93°, b = 120°, c = 150°

Step-by-step explanation:

b + 36 = 78 × 2 => b + 36 = 156 => b = 120°

87 × 2 - b = the minor arc between a and 78

=> 174 - 120 = 54

54 + b + 36 + c = 360

=> 54 + 120 + 36 + c = 360

=> c = 150°

(c + 36) ÷ 2 = a

=> (150 + 36) ÷ 2 = a

=> a = 93°

The slope between two points (2,b) and (1, -2) is 4. Find b.

Answers

Answer:

b=2

Step-by-step explanation:

To get slope given two points, take the difference of the y values and divide it by the difference of the x values.

(This is also called change in y over change in x, or rise over run)

b-(-2)/2-1=4

b+2/1=4

b+2=4

b=2

Find the value of x in the figure below.

Answers

Answer:

The sum of alternating angle end up to 180 degress

Alyssa is jogging near Central Park. She runs along 65th Street for about 0.19 miles, turns right and runs along Central Park West for about 0.28 miles. She then turns right again and runs along Broadway until she reaches her starting point. How long is her total run to the nearest hundredth of a mile?
A: 0.68 miles
B: 0.81 miles
C: 1.15 miles
D: 1.44 miles​

Answers

Answer:  B: 0.81 miles

Step-by-step explanation:

The find the total distance, you must look for firs the missing side. To get use the formula that is derived from the Pythagorean theorem which states that the square of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the other two sides.

The formula for this is: a^2 + b^2 = c^2

So let the first side or a be .19

and the second side be .28

and now we are looking for c which is the missing side

.19^2 + .28^2 = c^20.0361 + 0.784 = .1145

get the square root of .1145

√.1145 = it is approximately 0.34

get the total distance by adding three sides

= .34 + .19 + .28

= 0.81

Answer:

0.68

Step-by-step explanation:

you got to multiply

Need help for question number 1

Answers

Answer:

I believe that the answer is a

Step-by-step explanation:

tangent is

opposite/adjacent

Easy 7th grade math

Answers

Answer:

i think its G cause 25% but you don't have the time listed

Step-by-step explanation:

Answer:

I agree with the other person who answer 25% I thinking it's either H or G but im not sure

hope this helps

have a good day :)

Step-by-step explanation:

u-5=-8 is tell solution of equation ​

Answers

Answer:

u = -3

Step-by-step explanation:

Solve for u:

u - 5 = -8

Hint: | Isolate terms with u to the left hand side.

Add 5 to both sides:

u + (5 - 5) = 5 - 8

Hint: | Look for the difference of two identical terms.

5 - 5 = 0:

u = 5 - 8

Hint: | Evaluate 5 - 8.

5 - 8 = -3:

Answer: u = -3

answer
u = -3

step by step
u=-8+5
u =-3

hope that helps

The area of the base of a cylinder is 50.2cm2. The volume of the cylinder is 502.4cm3. Determine the height of the cylinder

Answers

Answer:

10

Step-by-step explanation:

10

What are the 2 primary algebraic methods to solve a system of equations?

Answers

There are 2 methods to solve a system of linear equations: direct methods and iterative methods. In this article, we will use the direct methods, in particular, Gauss-method. How to Solve a System of Linear Equations? Since most often time we work with data with many features (or variables).

Answer:

método de sustitución, el de reducción y el de igualación

Step-by-step explanation:

te escribí 3 aunque tu me dijiste 2 pero yo ya escribí 3

pero espero que te alla servifo de algo mi respuesta dame corona si te sirvio

 

Find the perimeter 5 1\2

Answers

Answer:

22

Step-by-step explanation:

Can teacher see the answers on the tutorials on plato? Or am i wasting my time? i have a lot of plato work to catch up and all the tutorials take like 30min while the tests only take like 5 am i wasting time?

Answers

Answers:

Depending on how many tutorials you have to watch then yes, remember you can ask questions on brainly that needs to be answered man, we got your back

what is the solution of 2^x = -3x + 5?​

Answers

Answer:

1

Step-by-step explanation:

The answer would be 1

PLEASE NO LINKS OR SITES!!!! JUST ANSWERS. THANK YOU!

Answers

Answer:2/16

Step-by-step explanation:

Answer:

= 64

do u need the working out?

Acre 10 bacteria population triples in size every day. Suppose a sample starts at 600 bacteria. He looks passion below models the number of bacteria in the sample after X days.And evaluate the expression for X=0, X=2, and X=3

Answers

Answer:

See below.

Step-by-step explanation:

Plug in each value for  x .

[tex]x=3 \Rightarrow 600\cdot 3^3 = 600\cdot 27=16200\\\\x=0\Rightarrow 600\cdot 3^0=600\cdot 1 = 600\\\\x=2\Rightarrow 600 \cdot 3^2=600\cdot 9 =5400[/tex]

If the height is 30 yards and the base has an area of 56 what's the volume?

Answers

Answer:

1680.

Step-by-step explanation:

30 * 56

Six times the sum of a number and 4 equals 5
Write as an equation

Answers

Answer:

6 (x+4) = 5

Step-by-step explanation:

Answer:

6(x+4)=5

Step-by-step explanation:

Find the length of a side of a square with an area of 96ft2.

Answers

Answer: about 9.79 ft

Step-by-step explanation: To find the side length, we need to find the square root of the area because to find the area we need to square the side length.

Please please help help me with my work schedule please please thank you so much no links or files and please be correct
This is for brainies

Answers

Answer:

1) B

2) C

3) True

Hope this helps!

Pls mark brainliest!

Answer:

1: B

2:C

3: False

Hope this helps!

What is 482.073 expressed in word form?

Answers

It’s four hundred eighty two and seventy three hundredths
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