Which expression is equivalent to - 3(m+5) ? A m - 15 B - 3m + 5 C -3m - 15 D - 15m

Mathematics

1 answer:

mylen [45]3 years ago

5 0

Answer:

C) -3m - 15

Step-by-step explanation:

Distribute -3 to all terms within the parenthesis:

-3(m + 5)

Multiply:

-3 * m = -3m

-3 * 5 = -15

-3m - 15 is your answer, or C)

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The perimeter of a rectangular piece of plastic is 14 millimeters. The piece of plastic is 3 millimeters tall. How wide is it?

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Solve the math problem

zalisa [80]

Answer:

$\frac{4w {}^{8} }{9m {}^{4} }$

Step-by-step explanation:

separate with like terms

$\frac{4}{9} , \: \frac{w {}^{9} }{w} \: and \: \: \frac{m {}^{5} }{m {}^{9} }$

the first fraction can be left alone as it can't be simplified any further

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the third fraction can be written as m⁵ ÷ m⁹, subtract the powers: 5 - 9 = -4, so it's simplified to m⁻⁴

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