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7nadin3 [17]
3 years ago
15

A rectangle is 12 feet long and 5 feet wide. If the length of the rectangle is increased by 25% and the width is decreased by 20

%
Mathematics
1 answer:
lisabon 2012 [21]3 years ago
5 0

Answer:

30 square feet.

Step-by-step explanation:

We have to find the main area of the rectangle to determine the changes.

We know, Area of a rectangle = Length × Width

Given,

Length = 12 feet

Width = 5 feet

Therefore, the area of the rectangle = (12 × 5) Square feet.

The area of the rectangle = 60 square feet.

Now, if the length of the rectangle increased by 25%, the new length would be = 12 feet (12 feet × 25%) = 12 feet + 3 feet = 15 feet.

If the width increased by 20%, the latest width would be = 5 feet + (5 feet × 20%) = 5 feet + 1 foot = 6 feet.

The new area of that rectangle = (15 × 6) square feet = 90 square feet.

The changes of area from the previous rectangle is = (90 - 60) square feet = 30 square feet.

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Answer:

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Step-by-step explanation:

We need to find in below option x has direct variation with y.

We solve for each;

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B. y-4 = x+6

Solving above expression we get;

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C. y+3 = x+3

Solving above expression we get;

y+3 = x+3\\y = x+3-3\\y=x

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D. 4y+1 = 4x-1

Solving above expression we get;

4y+1 = 4x-1\\4y = 4x-1-1\\4y=4x-2

From above equation we can state that 4 times y is equal to 2 less than 4 times of x.

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Hence the Answer which represent direct variation of x and y is,

C. y+3 = x+3

7 0
3 years ago
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Step-by-step explanation:

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