An express train also travels 350 miles but at a different constant speed. The express train completes the trip in 80% of the time it took the passenger train to travel 350 miles. What is the express train's
speed in miles per hour?

i dont know

step-by-step explanation:

hello from mrbilldoesmath!

answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb

greater than one

step-by-step explanation: