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gregori [183]
3 years ago
9

Which equations are true for x = –2 and x = 2? Check all that apply.

Mathematics
1 answer:
Katyanochek1 [597]3 years ago
3 0

Hi Brainiac


x² - 4 = 0

Add 4 to both sides

x² - 4 + 4 = 0 + 4

x² = 4

Now take the square root

x= +/-√4

x= 2 or x= -2

The answer is A


I hope that's help :)

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Evaluate using order of operations.<br> 9(8 – 11) – 3(-5)
yulyashka [42]

Answer:

-12

Step-by-step explanation:

9(8-11)-3(-5)

First do multiplication.

72-99+15

And then, do the rest of the equation from left to right.

-27+15

Answer that question to get:

-12

Hope this helped! :)

8 0
2 years ago
Solve the compound inequality.<br><br> 9 – 4x ≥ 5 or 4(–1 + x) – 6 ≥ 2
Y_Kistochka [10]
X ≤ 1 and x ≥ 3
Hope this helps :)
5 0
3 years ago
A cylinder’s radius is reduced to 2004-06-01-04-00_files/i0480001.jpg its original size and the height is quadrupled. How has th
asambeis [7]
I can't answer this question if we don't know by what scale the cylinder's radius was reduced. Luckily, I found the same problem that says the radius was reduced to 2/5. So, we find the ratio of both volumes.

V₁ = πr₁²h₁
V₂ = πr₂²h₂

where r₂ = 2/5*r₁ and h₂ = 4h₁

V₂/V₁ = π(2/5*r₁ )²(4h₁)/πr₁²h₁= 8/5 or 1.6

<em>Thus, the volume has increased more by 60%.</em>
6 0
3 years ago
Trevor’s total employment compensation is $33,500. If Trevor has no job expenses and his gross pay is $28,600, then his total em
svetoff [14.1K]

The equation be x/100 * 28,600 = 33,500, then we get 17%.

Trevor's total employee benefits exists 17.1% of his gross pay.

Therefore, the correct answer is option d. 17.1.

<h3>How to find Trevor's total employee benefits?</h3>

If you would like to know Trevor's total employee advantages, you can estimate this utilizing the subsequent steps:

To find the percentage of the total employee benefits x% of $28,600 exists $33,500.

To estimate the value of x, bring the variable to the left side and bring all the remaining variables to the right side. Simplify the values to estimate the result.

x/100 * 28,600 = 33,500

x = 33,500 * 100 / 28,600

x = 117.13% = 117%

117% - 100% = 17%

x = 17%

The correct result would be 17%.

Trevor's total employee benefits exists 17.1% of his gross pay.

Therefore, the correct answer is option d. 17.1.

To learn more about the value of x refer to:

brainly.com/question/12862290

#SPJ9

6 0
1 year ago
Read 2 more answers
A model of a human heart is 14 ft tall. If the scale used is 1 ft: 1/4 inch, how tall is the actual heart?
Simora [160]
The actual height of the heart is 3.5 inches

14 * .25 = 3.5 inches

I hope this helps :)

6 0
3 years ago
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