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stepladder [879]
2 years ago
7

The length of a rectangular garden is three feet less than twice it’s width. If the perimeter of the garden is 42 feet, what is

it’s length
Mathematics
1 answer:
Pie2 years ago
3 0
Answer: 13 feet

Step-by-step explanation: You are given that the perimeter, P, of the rectangle is 42 meters (i.e., P = 42). Also, the length, L, of the rectangle is 3 meters less than 2 times the width, W (i.e., L = 2W - 3).
Recall that the perimeter, P, of a rectangle is given by the following formula:
    P = 2W + 2L
Substituting 2W - 3 for L, we arrive at the following:
   P = 2W + 2(2W - 3)
   P = 2W + 2·2W + 2·-3  
   P = 2W + 4W - 6
   P = 6W - 6
Since we were given that  P = 42, then
    42 = 6W - 6
    42 + 6 = 6W - 6 + 6
    48 = 6W
    48/6 = 6W/6
    8 = W
Therefore, the width of the rectangle is 8 meters. Use this value to solve for the length:
    L = 2W - 3
    L = 2·8 - 3
    L = 16 - 3
    L = 13
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Answer:

Step-by-step explanation:

Given that among 500 freshmen pursuing a business degree at a university, 315 are enrolled in an economics course, 213 are enrolled in a mathematics course, and 123 are enrolled in both an economics and a mathematics course.

From the above we find that

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3 years ago
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Answer:

2i-3

Step-by-step explanation:

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Given<br> the<br> function<br> f(x)= 3(x-2)² + 5, what<br> is<br> f(-1)?
motikmotik

Answer:

32

Step-by-step explanation:

f(x)= 3(x-2)² + 5

Let x = -1

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5 0
2 years ago
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