The perimeter of a rectangle is 90 ft. Find the dimensions of the rectangle if the ratio of the length to the width is 8: 7

Question

anonymous · Answer

answers could be 
 30 ft by 15 ft
       26 ft by 19 ft
       24 ft by 21 ft
       20 ft by 25 ft

anonymous · Answer

@Easyaspi314   help please.

anonymous · Answer

Like we did before, if the ratio is 8:7, then that can be expressed  as 8x:7x.

So the perimeter is 2(8x) + 2(7x) = 16x + 14x = 30x

so 30x = 90

x = 3

So the dimensions is 8x or 8(3) = 24
                                  7x = 7(4) = 28

So it is a 28 by 24.

Understand?

anonymous · Answer

i think i do but thats not any of  the answers

anonymous · Answer

@Easyaspi314

anonymous · Answer

Sorry...I had 7(4)...supposed to be 7(3) = 21  becuase we had x = 3

So it is a 28 by 21

anonymous · Answer

24 by 21

anonymous · Answer

again...8x by 7x is 24 by 21 (when x = 3)

anonymous · Answer

im sorry iv just had some trouble with this thanks for your help @Easyaspi314