Question

Giving 20 points not alot but it's something :3 right aslo Hurry

Which expressions are equivalent to 30(1/2x-2)+40(3/4y-2) ?
a.45xy-220
b.15x-30y-200
c.15x+30y-200
d.15x+30y-64

Answer 1

`15x+30y-140`

Explanation:

`30(1/2x-2)+40(3/4y-2)`

`30(1/2x)+30(-2)+40(3/4y)+40(-2)`

`15x+-60+30y-80`

`15x+30y+-60-80`

`15x+30y+-140`

Answer 2

`= 15x + 30y - 140 \\ \\`

Explanation:

`30( (1)/(2) x - 2) + 40( (3)/(4) y - 2) \\ (30x)/(2) - 60 + (120y)/(4) - 80 \\ 15x - 60 + 30y - 80 \\ = 15x + 30y - 140 \\`

hope this helps you.