They would be riding in the train for 8 hours and in the car for 5 hours.
They spent 560 miles on the train
They spent 200 miles in the car
23 + d = 71. ———————————————————-
"T<u>he function is decreasing":</u>
This means the slope of the function will be negative at the given point. Anywhere the line is going down, from left to right, is decreasing. This eliminates choices A and C.
<u>"The function is concave down":</u>
This means the curve of the function will be open down (think of an upside down u). This eliminates choice E.
<u>"f(x)>0":</u>
This is anywhere the curve is above the x axis. This eliminates choice D.
The answer is Choice B) x=2.
Hope this helps!!
Ma=Mc is the correct answer
