2 years ago

What is the hypotenuse of 21ft and 28ft

Mathematics

1 answer:

REY [17]2 years ago

7 0

Answer:

See below.

Step-by-step explanation:

The hypotenuse is 35.

-hope it helps

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(8m-3n)^2 - (4m+3n)^2

natulia [17]

Answer:

$48m^2-72mn$

Step-by-step explanation:

We need to solve $(8m-3n)^2 - (4m+3n)^2$

We know that,

$(a+b)^2=a^2+b^2+2ab\\\\(a-b)^2=a^2+b^2-2ab$

Using the above formula,

$(8m-3n)^2 - (4m+3n)^2=(8m)^2+(3n)^2-2(8m)(3n)-[(4m)^2+(3n)^2+2(4m)(3n)]\\\\=64m^2+9n^2-48mn-(16m^2+9n^2+24mn)\\\\=64m^2+9n^2-48mn-16m^2-9n^2-24mn\\\\=48m^2-48mn-24mn\\\\=48m^2-72mn$

So, the final answer is $48m^2-72mn$ .

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3 years ago

Simplify x + 15 - 4.<br><br> x + 11<br> 11 x<br> x + 19

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Answer:

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35is what percent of 25

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Answer: 140

Explanation: 35/25 = 1.4 = 140%

Would appreciate brainly <3

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