10 POINTS FOR THE CORRECT ANSWER PLEASE HELP

Step-by-step explanation:

The Pythagorean theorem says:

where a and b are the two legs of the triangle and c is the hypotenuse.  Here, let's say a = 6 and b = . We then get the following equation:

So c = 7. Technically, c can also equal -7 since (-7)^2 = 49 as well but that does not apply here because a side length cannot be <0. So 7 is the answer.

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.

if you was gonna solve for a, a is a   < -12