Question

Which fractions represent the given fractions rewritten with their LCD? 2/5x+15y, 1/2x+6y

A). 4/10(x+3y), 5/10(x+3y)

B). 4(x+3y)/10(x+3y)^2, 5(x+3y)/10(x+3y)^2

C). 4/10x+90y, 5/10x+90y

D). 8/7x+21y, 10/7x+21y

Answer 1

We are given two expressions:
2/5x+15y and 1/2x+6y
The denominators can be factored into
5(x + 3y) and 2(x + 3y)
Which means that LCD is
10 (x + y3)
And the expressions would be
C). 4/ (10x+90y) and 5/ (10x+90y)