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Andrew [12]
4 years ago
5

Thomas wants to put a fence around a rectangular garden that is 12 feet long and 7 feet wide.

Mathematics
1 answer:
den301095 [7]4 years ago
8 0

Answer:

I am not sure if you wrote the questions and its options correctly

Step-by-step explanation:

Putting fence around a rectangular garden would require it's perimeter the perimeter of almost all shapes can be done by adding all the sides

The answer is: 12+7+12+7 which also can be written as: 2(12+7)=38

Which is.. P=2(l+w)

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marysya [2.9K]
Michelle would be 54 years old. 

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4 0
4 years ago
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How does doubling the side length of a rectangle affect its area
baherus [9]
Doubling the side-lengths will multiply the area by four.

Proof:
Let the side-lengths of the rectangle by x and y.  Clearly, the area will be x*y=xy.  The new rectangle will have side-lengths 2x and 2y, and thus area 2x*2y=4xy.  4xy/xy=4 - hence, the new rectangle has four times the area of the old one.
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3 years ago
I'm not sure how to do this
valentinak56 [21]
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3 0
4 years ago
Yis inversely proportional to the square of x.
PtichkaEL [24]

Answer:

(a) y = \frac{4}{x^2}

(b) x = \frac{2}{5}

Step-by-step explanation:

Given

Variation: Inverse proportional.

This is represented as:

y\ \alpha\ \frac{1}{x^2}

See attachment for table

Solving (a):

First convert variation to equation

y = k\frac{1}{x^2}

From the table:

(x,y) = (1,4)

So, we have:

4 = k * \frac{1}{1^2}

4 = k * \frac{1}{1}

4 = k * 1

4 = k

k = 4

Substitute 4 for k in y = k\frac{1}{x^2}

y = 4 * \frac{1}{x^2}

y = \frac{4}{x^2}

Solving (b): x when y = 25.

Substitute 25 for y in y = \frac{4}{x^2}

25 = \frac{4}{x^2}

Cross Multiply

25 * x^2 = 4

Divide through by 25

x^2 = \frac{4}{25}

Take positive square roots of both sides

x = \sqrt{\frac{4}{25}

x = \frac{2}{5}

4 0
3 years ago
The distance between two cities is 450 miles. On a map, they are 9 inches apart. What is the scale of the map?
nasty-shy [4]

Answer:

1 inch=50 miles

Step-by-step explanation:

450÷9=50

7 0
3 years ago
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