The roots of a quadratic equation are 7 and -3. Which quadratic equation has these roots?
(x + 7) (x – 3) = 0

(x - 7) (x + 3) = 0

(x – 7) (x – 3) = 0

(x + 7) (x + 3) = 0

Answers

Answer 1
The answer is (x - 7) (x + 3) = 0

Explanation: Put both equations equal to 0, so it looks like this: (x - 7) = 0 (x + 3) = 0
It doesn’t matter what you do first but I’ll start with (x - 7) = 0
First you remove the parenthesis
x - 7 = 0
Next you add the 7 on both sides. You do this to cancel the 7 so that the x is by itself.
x = 7
It’s the same thing for the (x + 3) = 0 but I’ll show you anyways
Remove parentheses
x + 3 = 0
Subtract the 3 from both sides that way the 3 cancels out and the x is on its own
x = -3

Related Questions

Write an equation for the line that is parallel to the given line and passes through the given point . Write the equation of the line in y=mx+b form
y=5x-7;(2,-2)

Answers

A parallel line has the same slope as the original equation. Therefore, the slope (m in y=mx+b) will be 5. From there, we can use the point-slope formula and convert it into the slope-intercept formula (y=mx+b).

Point-slope is:

y-y₁=m(x-x₁)

Plug in our known values:

y-(-2)=5(x-(2))

Distribute and set it equal to y:

y+2=5x-10

y=5x-12

Let me know if you have any more questions :)

What is the y-intercept of the function f(x)=4 – 5x?
ОООО
О Т + 0

Answers

Answer:

The y-intercept of the function is 4

Step-by-step explanation:

The y-intercept is the point at which the graph crosses the y-axis.

The word total tells you that the operation involved in the relationship is

Answers

Answer:

the word total tells you the operation is addition

What´s after -2 in a number line of negatives

Answers

Answer:

After negative 2 it would be negative 3

Step-by-step explanation:

---------------------------

   -3     -2    -1     0

please help me I'm so confused
Kathy babysits for $7.25 an hour plus $5.75 in transportation cost. Jared babysits for $7.50 an hour plus $3.25 in transportation cost. After how many hours is Jared the more expensive sitter?

Answers

After 11 hours Jared is the most expensive sitter

Explanation: kathys equation = 7.25(11) + 5.75= 85.50$

Jareds equation = 7.50(11) + 3.25= 85.75$


At 11 hours is when Jared exceeds kathy, he is more expensive

Please answer 5-8 ASAP I will give brainliest

Answers

Answer:

5. m∠A = 26

6. m∠D = 118

7. m∠E = 43

8. m∠H = 85

Step-by-step explanation: complementary= 90 supplementary = 180

5. (2x - 8) + (4x +4) = 90

6x - 12 = 90

6x = 102

x = 17

m∠A = 2x - 8  

m∠A = 2(17) - 8 = 26

6. (2x + 18) + (5x + 8) = 180

7x + 26 = 180

7x = 154

x = 22

m∠D = 5x + 8

m∠D = 5(22) + 8 = 118

7. (2x + 15) + (3x + 5) = 90

5x + 20 = 90

5x = 70

x = 14

m∠E = 2x + 15

m∠E = 2(14) + 15 = 43

8. (5x - 20) + (4x + 7 ) = 180

9x - 27 = 180

9x = 207

x = 23

m∠H = 4x -7

m∠H = 4(23) - 7 = 85

The next two terms of the sequence 4,7,10,13 are?

Answers

Answer:

16,16

Step-by-step explanation:

All you have to do is add 3 every time. i hope it helps

Answer:

16, 19

Step-by-step explanation:

add 3 each term

Joseph and Wendy were catching tadpoles. At first Wendy caught nine times three more than Joseph caught. Joseph was upset and released half of Wendy 's tadpoles, and then six times as many as Joseph caught swam away. After all of this, Wendy only had three tadpoles left. How many tadpoles did Joseph catch?

Answers

Answer:

Joseph caught 7 tadpoles

Step-by-step explanation:

Let the number of tadpoles caught by Joseph be x

The number of tadpoles Wendy caught will be ;

9(x + 3)

After Joseph was upset, he released half of Wendy’s tadpole and then six times as many as Joseph caught swam away leaving Wendy with only three tadpoles left;

Hence, mathematically;

9(x + 3)/2 - 6x = 3

Multiply through be 2

9(x + 3) - 12x = 6

9x + 27 -12x = 6

9x -12x = 6-27

3x = 21

x = 21/3

x = 7

Which table best describes a function with exponential decay?






PLEASE HELP!!!!

Answers

answer:
the 4th option

explanation:
the f(x) values are decreasing at a nonlinear rate

Do the side lengths of 8, 15, and 20 form a triangle? Explain.
Can you explain how you did this

Answers

Yes; The sum of the lengths of any two sides of a triangle must be greater than the length of the third side.

The side lengths  8, 15, and 20 form the sides of a .triangle

In order to determine whether the length of the sides forms a triangle, we will use the theorem that states that:

The sum of any two sides of the triangle must be greater than the third

Given the side lengths 8, 15 and 20

Taking the sum of any two sides;

8 + 15 = 23

Since 23 > 20 (third side), this shows that the theorem is true

Similarly;

8 + 20 = 28Since 28 > 15 (third side), this shows that the theorem is true

Also;

15 + 20 = 35Since 35 > 8 (third side), this shows that the theorem is true

Since all the conditions are met, hence the side lengths form a triangle.

Learn more here: https://brainly.com/question/24323553

Jude graphed the inequality s


Is his graph correct? Explain why or why not.

Answers

Answer:

Sample Response: No, Jude’s graph is incorrect. The inequality symbol is “less than,” so -9 is not included. He should have used an open circle on -9.

Step-by-step explanation:

sample response on edge 2020

Answer:

The < symbol means that -9 is not included in the solution. The graph should have an open circle, not a closed circle. The arrow is pointing in the correct direction.

Step-by-step explanation:

edge 2021

Translate "Fifteen more than a number."
A, 15 + x
B, X + 15
C. X-15
D. 15x

Answers

The answer is B. (x + 15)
I think it’s A, 15+x

If 125 students take a test in psychology and 20 get scores of less than or equal to 50%, then what is the percentile rank of a test score of 50%?



Group of answer choices

12

20

50

16

Answers

Answer:

20

Step-by-step explanation:

Write an equation, in slope-intercept form, to model each situation. You rent a bicycle for $20 plus $2 per hour.​

Answers

y=2x+20 x represents hours

Aisha, Silvio, and Jim, each solved the same equation. Aisha's answer was x = 4, Silvio's answer was x = 8, and Jim's answer was x = 16. If either Aisha or Jim, but not Silvio, is correct, which of these equations could it be? Select all that apply. x3 = 64 x2 = 4 x2 = 16 x2 = 256 x2 = 64 x3 = 8

Answers

Answer:

x³ = 64x² = 16x² = 256

Step-by-step explanation:

Equations and solutions

x³ = 64 ⇒   x = ∛64 = 4x² = 4 ⇒     x =√4 ⇒ x = ±2x² = 16 ⇒    x = √16 ⇒ x = ±4x² = 256 ⇒ x = √256 ⇒ x = ±16x² = 64 ⇒    x = √64 ⇒ x = ±8x³ = 8 ⇒      x = ∛8 ⇒ x= 2

Aisha's answer = 4

Silvio's answer  = 8

Jim's answer = 16

If either Aisha's or Jim's answer is correct then possible equations with same answers are:

x³ = 64x² = 16x² = 256

I need help with this?

Answers

Answer:

1/2 because if a is 1 d is half of that so the answer is 1/2.

PLS HELP!! GCF of 14, 15, 21

Answers

Answer:

It should be 1

Answer: 1 is your answer!

Step-by-step explanation:

GCF = 1

for the values 14, 15, 21

Solution by Factorization:

The factors of 14 are: 1, 2, 7, 14

The factors of 15 are: 1, 3, 5, 15

The factors of 21 are: 1, 3, 7, 21

Then the greatest common factor is 1.

Given the function f(x) = - 5x² – 13x – 5,
f(20) = ???

Answers

Answer:

-2265

Step-by-step explanation:

First, we replace x with 20.

[tex]f(20)=-5*20^2-13*20-5[/tex]

Then, we evaluate.

The * stands for multiplication.

[tex]f(20)=-5*20^2-13*20-5\\-5*400-260-5\\-2000-260-5\\-2265[/tex]

[tex]f(20) = - 5 \times {20}^{2} - 13 \times 20 - 5 \\ [/tex]

[tex]f(20) = - 5 \times 400 - 260 - 5[/tex]

[tex]f(20) = - 2000 - 260 - 5[/tex]

[tex]f(20) = - 2265[/tex]

_________________________________

And we're done.

Thanks for watching buddy good luck.

♥️♥️♥️♥️♥️

The number of students in a chess club decreased from 40 to 19. What is the percent decrease? Round your answer to the nearest percent. The percent decrease is %.

Answers

Answer:

i think its 20

Step-by-step explanation:

Answer:

46

Step-by-step explanation:

Amount of change = Greater Value − Lesser Value

= 24 − 13 Substitute values.

= 11 Subtract.

Find the percent decrease. Round to the nearest percent.

Percent Change =  

Amount of Change

Original Amount

 

=  

11

24

 Substitute values.

≈ 0.458 Divide.

= 46% Write as a percent and round.

The percent decrease is 46%.

Find the values of x and y.

Answers

Answer:

The answer is A, x=15 and y=17

Step-by-step explanation:

12x+2=146 what does X equal

Answers

Answer:

x = 12

Step-by-step explanation:

12x = 146 - 2

x = 144 ÷ 12

x = 12

It cost $12 to attend a golf clinic with a local pro. Buckets of balls for practice during the clinic cat $6 each

Answers

Answer:

$30 but the number depends on the bucket of balls used

Step-by-step explanation:

$12 + $6b =

$12 + $6(3) =$30

b= bucket of balls

I used 3 bucket of balls for this clinic

Please help!
A factory used 72kg of tomatoes to make 8 batches of pasta sauce .
what quantity of tomatoes did the factory put in each batch?

Answers

88888888888888888888888888

helppppp I need to find the points,slope and y-intercept​

Answers

Answer:

The y-int is -3, There is a point at (-15,0), (-30,3), The slope is -1/5

Step-by-step explanation:

The slope formula is y2-y1/x2-x1 which if you use it for those points, you get -1/5

Hope this makes sense! If you need help, just comment!!

Given the points (2,4),(-2,6),(1,3), and (0,3), categorize the domain and range.
Domain
Range
No Answers Chosen
ING
1
Possible answers:
2
3
All real numbers
-2
0
4
6
2
3
4

Answers

Answer: range: 3, domain: 4

Step-by-step explanation:

the range of a problem is basically the difference between the smallest and the largest y value. the largest y value here is 6 and the smallest is 3, so 6-3 = 3 -> 3 is your range! now for domain: the domain of a problem is the difference between the smallest and largest x value. the largest x value is 2 and the smallest is -2, so 2 - -2 = 4 -> the domain is 4! hope this helped!

The diameter of the average cell in the human body is 1 x 10^-5 meters. The diameter of a grain of sand is about 2 x 10^-4 meters. The diameter of a human hair is about 0.000025 meters. Part B (3 points): How many times longer is the diameter of a grain of sand than the diameter of the average cell in the human body? Show your work.

Answers

4

0.0004/ 0.00001 = 4

What is the solution to this inequality?
-13x < 65
O A. x<-5
O B. x>5
O c. x<5
O D. x>-5

Answers

Answer:

It’s D, X>-5

I’m sure I had that question and I got it right

A basketball team played six games. In those games, the team won by 9 points, lost by 18, won by
8, won by 11, lost by 3, and won by 5. What was the mean difference in game scores over the six
games?

Answers

Answer: 8

The mean is the average, the average means to add all the numbers, then divide by how much numbers there are. This means 8+14+9+10+1+6 = 48, 48/6  which equals 8.

please help me, i really don't know how to solve this question ​

Answers

Answer:

60 degrees

Step-by-step explanation:

40 degrees + 2y+20 degrees makes a straight angle. (from alternate interior angles postulate)

Thus, 2y+60 degrees = 180, or 2y = 120 degrees.

This means y = 60 degrees

Mae Ling earns a salary of $360 plus a 8.0% commission on sales at a gift shop. How would she make in a week if she sold $4,900 worth of merchandise.

PLEASE HELP I WILL MARK BRAINLIEST PLEASEE

Answers

$752

4,900 x .08 = 392
392 + 360 = 752

answer

757

Step-by-step explanation:

I just know made a A on the test

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