Answer:
Easiest and fastest way is to graph both equations into a graphing calc and trace the graph to where they intersect.
Alternatively, you can use substitution to solve for your answer.
Step-by-step explanation:
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.
Answer:
14, 16, 18, 20
Step-by-step explanation:
Answer:
Step-by-step explanation:
17 : Both
9.5 : Rational
7/5 : Rational
3 1/2: Rational
29: Both