What number would you have to add to both sides to complete the square?

2 answers:

5 0

X^2 + 12x = -6

x^2 + 12 x + 6^2 = -6 + 6^2

(x + 6)^2 = - 6 + 36

(x +6)^2 = 30

In the first step I had to add 6^2 = 36. The answer is option B. 36.

Viktor [21]3 years ago

5 0

I think the answer is A

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Please solve...Thanks

liberstina [14]

Micheal has 40ft of fencing for the rectangular dog run. So the perimeter of the dog run is 40ft.

Perimeter=40ft

The perimeter of a rectangle is:

P=2l+2w

Since we know the length is 5 and the perimeter is 40, we can solve for the width.

P=2l+2w
40=2*(5)+2w
40=10+2w
subtract 10 from both sides
30=2w
divide both sides by 2
15=w

The width of the fence is 15feet.

3 0

3 years ago

Evaluate 7 + (-3x^2) For x = 0 A. -2 B. 0 C. 4 D. 7

Goryan [66]

Answer: D. 7

Step-by-step explanation:

The problem tells you that x = 0 so replace everything that is x in the equation with 0 so the problem becomes

7 + (-3(0)^2)

Now we just solve the problem normally.

solve the problem in the parenthesis first, we must multiply -3 times 0^2 is 0

so now our problem is 7 + 0 which is 7

8 0

3 years ago

What is the sum?

Ludmilka [50]

Is c the answer is C maybe not matbe

7 0

3 years ago

Disregarding sales tax, how much will you save when

docker41 [41]

Answer:

$2.40

Step-by-step explanation:

$12.00÷100=0.12x20=2.4

hope this helps, have a good day.

5 0

2 years ago

(5x + 7)(5x – 7) Foil method

Pavlova-9 [17]

Answer:

25x-49

Step-by-step explanation:

5x×5x=25x 5x×-7= -35x

7×5x=35x 7×-7=-49

(combine like terms)25x+-35x+35x= 25

hope that helped you!

6 0

3 years ago