A cruise ship made a trip to Vancouver and back. The trip to Vancouver took 8 hours, and the trip back took 12 hours. The ship averaged a speed of 18 km/h (kilometers per hour) on the trip back. What was the ship's average speed on the trip to Vancouver?

the answer is b

i can't see the picture : /

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb

step-by-step explanation:

the options are kind of confusing. i can tell you what i see going on here when i look at the graph.

the class and exam medians are closely related, and it looks like the low outlier on the exam did pull the median lower. [tex][/tex]