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AssignmentMultiple Select

Working with Formulas

Question 1 • TX-College Prep Math A

Evaluate the formula for the perimeter of a rectangle to solve the problem. Then check all that apply.

Answer
A
First, write the formula for the perimeter of a rectangle: P = 2l + 2w.
B
Next, use parentheses when you substitute 50 for l and 25 for w.
C
After multiplying, add 100 and 50.
D
The school needs 5,000 meters of fencing.
E
The school needs 150 meters of fencing.

Explanation

The perimeter formula for a rectangle is P = 2l + 2w, so choice A is correct. Substitute the length 50 and width 25 using parentheses: P = 2(50) + 2(25). Multiplying gives 100 + 50, and adding gives 150 meters. Thus choices B, C, and E are also correct; 5,000 meters is not the perimeter.

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