Answer:
Rr = 51 : 68
Step-by-step explanation:
Y=1/2x+6
Y-2=1/2(x+8)
Then simplify and get y by itself
Answer:
40 girls
Step-by-step explanation:
Set up a proportion where x is the number of girls in band class:
= 
Cross multiply and solve for x:
3x = 120
x = 40
So, there were 40 girls in band class.