All categories

3 years ago

Select all the factors of: 7x2 − 28 options: 7 7x (x + 2) (x − 2) (x2 + 4)

Mathematics

1 answer:

Salsk061 [2.6K]3 years ago

8 0

Answer:

7(x-2)(x+2)

Step-by-step explanation:

7x^2 -28

Factor out a 7

7(x^2 -4)

The terms inside the parentheses is the difference of squares, so it is factorable (a^2-b^2) = (a-b)(a+b)

7(x-2)(x+2)

You might be interested in

HELP MATH ASAP! MARKING BRANLIST

qwelly [4]

Answer:

-4/3

Step-by-step explanation:

Use the slope formula:

$\frac{y2-y1}{x2-x2}$

-4 - 12/ 13 - 1

-16/12

Simplifies to -4/3

8 0

3 years ago

Mr.Gadgets car broke down on the turnpike.Acme towing charged $30 plus $3 per mile to tow the car.If Mr.Gadget paid $174, how fa

aalyn [17]

The car was towed for 48 miles.

Step-by-step explanation:

Given,

Amount charges by Acme towing = $30

Per mile charges = $3

Total charged = $174

Let, x be the number of miles.

Towing charges + Per mile charges*number of miles = Total charged

30+3x=174

Subtracting 30 from both sides

$30-30+3x=174-30\\3x=144$

Dividing both sides by 3

$\frac{3x}{3}=\frac{144}{3}\\x=48$

The car was towed for 48 miles.

Keywords: linear equation, subtraction

Learn more about linear equations at:

#LearnwithBrainly

8 0

3 years ago

If you triple 4 and subtract to each day how many days until you have zero

Mrrafil [7]

Do you mean subtract two each day? If so...
4x3=12 and 12 divided by 2 is 6 so it would take six days to reach zero
or
you could manually subtract two from 6 each days as in 12-2=10 (1 day), 10-2=8 (2 days), and so on...

5 0

3 years ago

What is the solution to the system of equations? y = -5x + 3 y = 1

Gekata [30.6K]

9514 1404 393

Answer:

(x, y) = (2/5, 1)

Step-by-step explanation:

Substitute for y and solve for x.

1 = -5x +3

-2 = -5x . . . . . . subtract 3

2/5 = x . . . . . . divide by -5

The solution is (x, y) = (2/5, 1).

4 0

3 years ago

INSTRUCTION: Solve the matrix multiplication on the space provided.

Tema [17]

Hope this will help u...☝☝✌✌✌

6 0

3 years ago