Use an algebra equation solve problems a rectangle is 3times as long as it is wide the perimeter is 60cm. Find the dimensions of the rectangle round to nearest tenth if necessary answers are 7.5cm.by22.5, 7.5cm.by52.5cm, 20cm.by60cm., 15cmby22.5cm.

Question

Use an algebra equation solve problems a rectangle is 3times as long as it is wide the perimeter is 60cm. Find the dimensions of the rectangle round to nearest tenth if necessary answers are 7.5cm.by22.5,  7.5cm.by52.5cm,  20cm.by60cm.,  15cmby22.5cm.

anonymous · Answer

Let x= the width of the rectangle. Let l= length and w= width. This means that 2x+2(3x) = 60

anonymous · Answer

Because l= 3w and w=x

anonymous · Answer

Therefore, x=w=7.5, and l=3w=3(7.5)=22.5

anonymous · Answer

The answer is the first one, 7.5cm by 22.5 cm.