Three-eighths of the seventh grade students were taking advanced math at the beginning of the year but 7 dropped out by the end of the year if they're 140 students taking advanced math at the end of the year how many total 7th grade students are there

d. vertex

step-by-step explanation:

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.