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4 years ago

Please help me solve

Mathematics

2 answers:

AlexFokin [52]4 years ago

8 0

Answer:

w^2 +3w -88=0

Step-by-step explanation:

l = w+3

w = width

A = l*w

A = (w+3) *w

Distribute

A = w^2 +3w

We know the area is 88

88 = w^2 +3w

Subtract 88 from each side

0 = w^2 +3w -88

Lynna [10]4 years ago

6 0

Answer:

C. w² + 3w - 88 = 0

Step-by-step explanation:

Area of a Rectangle: A = lw

We need to figure out what l and w are:

l = w + 3

w = w

So now we know our 2 variables, we plug it into the area formula:

88 = w(w + 3)

88 = w² + 3w

The only way to find w is using quadratic formula or factoring:

w² + 3w - 88 = 0

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Murrr4er [49]

Answer:

The new extra processor would take 20 hours to download the movie.

Step-by-step explanation:

This word problem presents two variables: $n$ - Processing capacity, dimensionless; $t$ - Download time, measured in hours. Both variables exhibit a relationship of inverse proportionality, that is:

$t \propto \frac{1}{n}$

$t = \frac{k}{n}$

Where $k$ is the proportionality constant.

Now, let suppose that original processor has a capacity of 1 ( $n = 1$ ), the proportionality constant is: ( $t = 5\,h$ )

$k = n\cdot t$

$k = (1)\cdot (5\,h)$

$k = 5\,h$

The equation is $t = \frac{5}{n}$ and if time is reduced to 4 hours by adding an extra processor, the processing capacity associated with this operation is: ( $t = 4\,h$ )