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andrew-mc [135]
3 years ago
5

The length of a rectangle is 3 units shorter than one-third of the width, x. Enter an expression in the box that represents the

perimeter of the rectangle. Note: Use one variable and a fraction in the answer.
Help please! I have absolutely no idea how to solve!!!! ^^^
Mathematics
2 answers:
cluponka [151]3 years ago
7 0
Since length is 3 less than 1/3 width, set up equation l=(1/3)w-3. Because P=2(l+w), substitute l with the euation and get P=2(4/3w-3)
Rashid [163]3 years ago
7 0

Let

y----------> the length side of the rectangle

x-----------> the width side of the rectangle

we know that

the perimeter of the rectangle is equal to

P=2x+2y --------> equation 1

y=\frac{x}{3}-3 --------> equation 2

substitute equation 2 in equation 1

P=2x+2[\frac{x}{3}-3]\\ \\P=2x+ \frac{2x}{3}-6 \\ \\P=(\frac{8x}{3}-6)\ units

therefore

<u>the answer is</u>

P=(\frac{8x}{3}-6)\ units

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