John would have 52 dollars left by the fourth week.
7(dollars spent each week) x 4 ( number of weeks)=28 (spent in 4 weeks)
80 - 28 =52
The equation is g times x
A) $3+(0.5x4)=$5
B) $3 + (0.5x11) = $8.50
50% chance of winning and 50% chance of losing.