Answer:
Step-by-step explanation:
Problem 1
<em>Set Up the Proportion</em>
3 cm / 8 km = x / 20 km Cross multiply
3*20 = 8x Combine the left
60 = 8x Divide by 8
60/8 = x
7 4/8 = x
7 1/2 km = x
7.5 km = x
Problem 2
3 cm / 8km = 12 cm / x Cross multiply
3x = 12 * 8 Combine the right
3x = 96 Divide by 3
3x/3 = 96/3
x = 32 km
Answer:
b) 22
Step-by-step explanation:
180 = (4x+12) + (3x+14)
180 = 7x + 26
7x = 154
x=22
