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Zinaida [17]
3 years ago
15

What is the length of each edge of a cube if its surface area is 486 square units?

Mathematics
1 answer:
Luden [163]3 years ago
4 0
SA = 2LW + 2LH + 2WH

Since it is a cube, all of the dimensions, LWH, will be the same. 

SA = 2s^2 + 2s^2 + 2s^2

SA = 6s^2486 = 6s^2

Divide both sides by 681 = s^2Take the square root of both sides. 9 = s

Hope this helped☺☺
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The vertices of a triangle are A(4, 1), B(9, 1), C(2, 5). What is the area of this triangle.
kiruha [24]

Hey there!

\large\boxed{10u^2}

Formula for the area of a triangle is (1/2)bh.

Base of this triangle is 5, height is 4.

Image attached.

Plug values into the formula:

A = (1/2)(5)(4)

Simplify.

A = (1/2)(20)

A = 10

Area of the triangle is 10 units².

Hope this helps!

6 0
3 years ago
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What's 52 times 86? Please Help!!!!
ivann1987 [24]
Fifty two times eighty six = 4472
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What fraction of 2 1/4 is 3/4 ?​
hoa [83]

Answer:2/4 + 3/4 - fraction calculator. The result is 5/4 = 1 1/4 = 1.25 = five quarters (or one and one quarter)

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3 years ago
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NEED ANSWER ASAP!!! Express your answer in scientific notation. 9.3 X 107 - 3.14 X 106
kirza4 [7]

Answer:

89.86\times 10^6

Step-by-step explanation:

9.3\times 10^7 - 3.14\times 10^6\\

In order to simplify the above expressions we make sure that we get same powers of 10 for both the terms.

So, we multiply and divide the first term with 10

Dividing first term by 10.

\frac{9.3\times 10^7}{10}\\9.3\times 10^{7-1}\\9.3\times 10^6\\

Now multiplying it by 10.

10\times9.3\times 10^6\\93\times 10^6

Evaluating the new expressions.

93\times 10^6 - 3.14\times 10^6\\

Taking 10^6 common factor out.

(93-3.14)\ties 10^6

=89.86\times 10^6

5 0
3 years ago
Please help me thanks
stich3 [128]

Answer:

5. 26⁰F, rise

6. 0, Added both the numbers instead of subtracting

7. 10⁰C

8. 25⁰F

9. 13⁰F

10. -4

5 0
3 years ago
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