Answer:
Lucy has $60
Step-by-step explanation:
Mel had 80
Lucy had 40
Now Mel has 100
and Lucy has 60
60/100 = 3/5
The answer is C Kay. Got it?
Answer:
or 
Step-by-step explanation:
Multiply both sides of the equation by 

Simplify both sides of the equation.
or 
<em>hope this helps :)</em>
Which ones do you need help on?
Answer:
R1 = {(1, 7) (2, 7) (4, 7) (6, 7)}
R3 = {(x, y) (y, z) (z, t) (t, v)}
R1 and R3 are functions because first element in the ordered pair is not repeating, i.e they have unique images