Answer"
8inches = 100miles
18inches = 225miles
12inches = 150miles
Step-by-step explanation
Given the conversion rate;
2inches = 25miles
For 8 inches;
2inches = 25miles
8inches = x
Cross mutlply
2x = 8 * 25
2x = 200
x = 200/2
x = 100miles
Hence 8inches = 100miles
For 18inches
2inches = 25miles
18inches = y
Cross multiply
2y = 25* 18
2y = 450
y = 450/2
y = 225miles
Hence 18inches = 225miles
For 12inches;
2inches = 25miles
12inches = z
Cross multiply
2z = 12 * 25
2z = 300
z = 300/2
z = 150miles
Hence 12inches = 150miles