142=120% of x
120% of x= 1.2x
142=1.2x
142/1.2 = 1.2x/1.2
x= 118.33
The unknown number should be 118.33, rounded to 118 or so.
Step-by-step explanation:
answer is in photo above
Answer:
It’s the last option; 10/24 and 20/24
Step-by-step explanation:

Answer: D
Step-by-step explanation:
We know the midline is at y=40, so eliminate A and B.
The period is 160, so 
This eliminates option C, leaving us with D.