If I read your post properly, the two fractions are -14/10 and -12/b.
The LCD is found by finding prime factors of each term, then collecting the ones that appear the most.
10 = 2 x 5
b = b
2 x 5 x b = 10b
Let x equal the width
let 2x equal length
2x + 2x + x + x = 7.5
6x = 7.5
x = 1.25
width = 1.25
length = 2.5
(2.5)(1.25) = 3.125
3.125 = 3 1/8
area = 3 1/8
<span>f(g(x))= x and g(f(x))=x</span>
Answer: 0.00459
Step-by-step explanation: