Let James be x years old
Joe = 10 + x
After 8 years
18 + x = 3(x)
18 + x = 3x
18 = 2x
x = 9
Joe is 19
James is 9
The slope of the line is 1/7 You do the change in y divided by the change in x
6 quarters = $1.50
9 Nickels = $0.45
Total= $1.95
Answer is 6 quarters and 9 nickels.<span />
30 + 70 + D = 180
100 + D = 180
D = 80°
1.7 times 10 to the 9 power
1.52 times10 to the 8 power
