Write an inequality for x that would give a rectangle with the length of 3ft and width of x+5ft, a of at least 300 ft.

Question

Mathematics

Keenan Cobb

23 July, 09:51

Write an inequality for x that would give a rectangle with the length of 3ft and width of x+5ft, a of at least 300 ft.

+5

Answers (1)

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Helen Buckley · Answer 1

P≥300

300≤P

P=2 (L+W)

300≤2 (L+W)

L=3

W=x+5

300≤2 (3+x+5)

300≤2 (8+x)

divide both sides by 2

150≤8+x

minus 8 both sides

142≤x

x is at least 142

width is at least 147