X Y
————-
-2. -4
-1. -8
0. -12
1. -16
2. -20
I redrew the triangle (just turned it around it make it easier to understand).
X*2 +5 =41
Subtract 5 from both sides
X*2=36
Square root of 36 is 6
X=6
Solve
6*2+5 =41
This’s correct!
9 x 8 = 72
155 - 72 = 83
83 divided by 6 =13.8
So he has to make at least 14 deliveries in order to reach his goal.