Answer:
24
Step-by-step explanation:
x+120+36=180
x+156=180
x=180-156
x=24
Answer:24
Step-by-step explanation:
Sum of their ages is 60 yr. As such
7x + 3x = 60
10x = 60
x = 60 / 10
x = 6
The rationale is 6, therefore
Father's age is 7x = 7 × 6= 42 years
Son's age is 3x = 3 × 6 = 18 years
Difference in their ages
42 - 18 = 24 years
Answer:
109 car stereos
Step-by-step explanation:
If 149 car stereos had a CD player (with or without a cassette player), and 40 car stereos had both a CD and a cassette player, the number of stereos with only a CD player is determined by:

109 car stereos had only a CD player.
Answer 0.06*0.7+0.03=0.072 and 0.06*(-0.2)+0.03=0.018