3 years ago

(−2)(−2)+4 is equal to

Mathematics

1 answer:

abruzzese [7]3 years ago

8 0

Answer:

Step-by-step explanation:

[-2][-2]=-2 x-2=4

4+4=8

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Select the action you would use to solve 4x = 16. Then select the property

oksian1 [2.3K]

Answer:

Step-by-step explanation:

Since you are trying to find x, you have to divide both sides by 4 to isolate x and get your answer.

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2 years ago

Use completing the square to determine which of the following gives the solutions to 3x2 - 24x + 40 = 28.

jeka94

Answer:

$x=4+2\sqrt{3}$

$x=4-2\sqrt{3}$

Step-by-step explanation:

Completing the square

when $ax^2+bx+c=0$

Given equation:

$3x^2-24x+40=28$

Subtract 40 from both sides:

$\implies 3x^2-24x=-12$

Divide both sides by 3:

$\implies x^2-8x=-4$

Add the square of half the coefficient of $x$ to both sides:

$(\frac{b}{2})^2=(\frac{-8}{2})^2=16$

$\implies x^2-8x+16=-4+16$

Factor the left side and simplify the right side:

$\implies (x-4)^2=12$

Square root both sides:

$\implies x-4=\pm\sqrt{12}$

Add 4 to both sides and simplify the radical:

$\implies x=4\pm\sqrt{4 \cdot 3}$

$\implies x=4\pm\sqrt{4}\sqrt{3}$

$\implies x=4\pm2\sqrt{3}$

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1 year ago

During summer vacation, Brooke read, on average, 6 pages per night. Once she returned to school, she averaged 9 pages per night.

Monica [59]

There is a 50% increase. 6 x 1.5 = 9

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3 years ago

Subtract the following complex numbers: (10-8i)-(13-10i) ??

patriot [66]

⇒ (10 - 8i) - (13 - 10i)

⇒ 10 - 8i - 13 + 10i

⇒ -3 + 2i

Option A is the Answer

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2 years ago

Suppose your opening checking account balance is $124.53. After you

babymother [125]

Answer:

Balance = $124.53 – $57.49 + $103.49 = $170.53

Step-by-step explanation:

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3 years ago

Read 2 more answers