2 years ago

What is (81x^2 -4y^2) square units factored?

1 answer:

4 0

To solve, use the difference of squares rule. (a^2-b^2)=(a-b)(a+b). In your equation, your a^2=81x^2 and your b^2=4y^2, making your a=9x and your b=2y. This makes your factored form (9x-2y)(9x+2y).

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Which property of real numbers is shown below?<br><br> -6 + 6 = 0

Aneli [31]

Answer:

Additive inverse property

Step-by-step explanation:

When you add opposites you get 0.

Another word for opposites is additive inverses.

This is the additive inverse property.

It says when you do -a+a or a+(-a) you get 0 for any number a.

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2 years ago

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2 less than three times a number is the same as the number plus 10

GenaCL600 [577]

3x - 2 = x + 10
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3 years ago

The sum of fifteen and six times a number t is 81

Over [174]

Well the sum is 15+6=21. then you must do 81-21=60. So your answer must be t=60.

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2 years ago

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17=5k-2 what Is (k) help me please

MAXImum [283]

17=5k-2
add 2 to both sides
19=5k
divide both sides by 5
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3 years ago

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Antonette gets $70\%$ on a 10-problem test, $80\%$ on a 20-problem test and $90\%$ on a 30-problem test. If the three tests are

notka56 [123]

Answer:

Percentage score will be 83.33 %

Step-by-step explanation:

We have given Antonette gets 70 % on 10 problem test

Let consider here here total problem = total marks

So marks get 10 10 problem test = 10×0.7 = 7

Marks get in 20 problem test = 20×0.8 = 16

And marks get in 30 problem test = 30×0.9 = 27

Now total marks get get by Antonette = 7 +16 + 27 = 50

And total marks = 60

So percentage score of Antonette $=\frac{50}{60}\times 100=83.33$ %

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3 years ago