Answer:
-15.6666667
Step-by-step explanation:
first of all divide both side then minus the divide number
Let d = the one-way trip
Write a time equation: time = dist/speed
time out + time back = 4.5 hrs
d/80 + d/100 = 4.5
Multiply by 400 to clear the denominators
400*d/80 + 400*d/100 = 400(4.5)
Cancel the denominators
5d + 4d = 1800
d = 1800/9
d = 200 miles max distance
$8.
See attached picture.
The answer is 3 miles.
4+2=6 , 6-9=3
40x+150>=400 i think
40x+150>=400
40x>=250
x=6.25
