Sergei buys a rectangular rug for his living room. he measures the diagonal of the rug to be 18 feet. the length of the rug is 3 feet longer than the width. what are the approximate dimensions of the rug? round each dimension to the nearest tenth of a foot.
10.4 feet by 7.4 feet
11.1 feet by 8.1 feet
13.4 feet by 10.4 feet
14.1 feet by 11.1 feet

13875138answer:

step-by-step explanation:

use a calculator!

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional