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4 years ago

90/ [10(3squared - 4)

Mathematics

1 answer:

telo118 [61]4 years ago

7 0

90/ [10(3^2 - 4)]
= 90/ [ 10 (5)]
= 90/ 50
= 9/5
= 1.8

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If m + n = 7 and 2n - 3m = 6, what is the value of 3n - 2m ?

S_A_V [24]

Since m + n = 7 we know m = 7-n. So now we have 2n - 3(7-n) = 6. From this we get n = -3. So now we know m - 3 = 7 so m = 10. So now we have 3(-3) + 2(10) = ? and this comes out as 11

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3 years ago

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Open Response

labwork [276]

Answer:

10 times less

Step-by-step explanation:

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3 years ago

Emily knows that the area of a rectangle is 54x9y8 square yards and that it’s length 6x3y4 yards. If she divides the area by the

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Answer:

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Option C is correct.

Step-by-step explanation:

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We need to find width of rectangle.

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$Area\:of\:rectangle=Length\times Width\\Width=\frac{Area\:of\:rectangle}{Length}$

Putting values in the formula to find Width of rectangle

$Width=\frac{Area\:of\:rectangle}{Length}\\Width=\frac{54x^9y^8}{6x^ 3y^4}$

Using the exponent rule: $\frac{a^m}{a^n}=a^{m-n}$

and simplifying the terms we get

$Width=\frac{54x^9y^8}{6x^3y^4}\\Width=9x^{9-3} \: y^{8-4}\\Width=9x^6 y^{4}$

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3 years ago

What is the value of x?

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Answer:

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cross-multiply:

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Therefore, x = 4

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3 years ago

I really need help, please explain btw.

Stella [2.4K]

It's short in txt messages used as "by the way"

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3 years ago