What is the following expressions are equivalent to c/d

/ =(+)

-c/-d=c/d

a

a   and b.

step-by-step explanation:

-c/-d   = (-1/-1) * c/d

= 1 * c/d = c/d.

- (c / -d)

= -c / -d = c/d.

4/6 = 2/3

so it should take 3/3 hours per man. so 9 hours is the answer 3*3 =9

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.