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yulyashka [42]
3 years ago
11

The length of a rectangle is 5 times it’s width. If the perimeter of a rectangle is 72 m, find its area

Mathematics
1 answer:
Olenka [21]3 years ago
6 0
X = width. the perimeter of a rectangle is 2*length + 2*width, so the perimeter of this rectangle is 2x + 2(5x) = 72. distribute the two to get 2x + 10x = 72. so 12x = 72. divide by twelve to get x = 6. the width is six, so the perimeter (5x) is 30. the area of a rectangle is length times width, 30*6, so the area is 180 m.
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Someone help mamd explain
sineoko [7]
So if 3/4 of the seats are filled, there are a few methods we can use.

The simplest method:

Just multiply 3/4 by 500, to get 1500/4, or 375.

So 375 seats are filled.

A method that can be used with harder problems and will be more efficient in those cases:

Using proportions.

You could say,

?/500 = 3/4

And then cross multiply,

500 * 3 = 4 * x (say the ? = x)

1500 = 4x

/4         /4

x = 375

So either way we get the answer, 375 seats were filled.

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5 0
3 years ago
If f(x)=x2-25and g(x)=x-5 ,what is the domain of (f/g)(x)?
djyliett [7]

Answer:

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Interval Notation:

(−∞,5)∪(5,∞)

Set-Builder Notation:

{x|x≠5}

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7v + 14

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