Answer:
C
Step-by-step explanation:
80/20 = 4 hours taken by Davie
90 mins = 1.5 hours
Horatio has 4-1.5 = 2.5 hours
Speed: 80/2.5 = 32 miles/hour
It will take Davie 4 hours to drive 80 miles at 20mph.
Horatio has to drive faster to reach the destination at the same time, if he drove 32 mph he will take 3hrs and 30 mins since Davie left 90 mins earlier.
the minimal number is 3
Your answer in y=mx+b is y=4/2+-2
(7,3)
X= -2+3y
....
-2+3y-3y=-2
-2+3y+3y=16
.......
6y=18
...
y=3
x=7
-2x + 5 </= 11
-2x </= 6
x =/> -3
