The length of a rectangle is three times longer than its width. the perimeter of the rectangle is 16 feet. if x represents the width of the rectangle, which equation can be used to find its value? 3x + x = 16 (3x)(x) = 16 3x + 3x + x + x = 16 3x + 3x + x = 16

x - width

3x - length

16 - perimeter

x + x + 3x + 3x - perimeter

3x+3x+x+x=16

Step-by-step explanation:

The length of a rectangle is three times longer than its width. The perimeter of the rectangle is 16 feet

LEt x represents the width of the rectangle

Length is 3 times longer than its width

so length of rectangle = 3x

Perimeter of rectangle =length + length + width + width

= 3x+3x+x+x

Given Perimeter = 16

So 3x+3x+x+x=16

+25 = x

step-by-step explanation:

here x is the hypotenuse of a right triangle whose legs are 7 and 24.   by the pythagorean theorem, 7² + 24² must equal x²:

x² = 49 + 576 = 625.   thus, x = +√625 = +25 = x

the answer is b.)

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