Wendy took a trip from one city to another, a distance of 230 mi. She traveled part of the way by bus, which arrived at the train station just in time for Wendy to complete her journey by train. The bus averaged 40 mi/h, and the train averaged 90 mi/h. The entire trip took 4 and 1/2 h. How long did Wendy spend on the train?

answer is the third choice:

3x^5+4x^4+x^3+2x^2-10x-7=0

step-by-step explanation:

the graph in the attached figure

step-by-step explanation:

we have

using a graphing tool

the graph in the attached figure

the roots are ( x-intercepts) x=-0.5,x=1,x=3

the y-intercept is the point (0,3)

b

step-by-step explanation:

u take $75 minus $60.the anwer/original($75)multiply by 100

22

step-by-step explanation:

22