So in this equation a=4 and b=3, but i don’t know if i should square the number before multiplying it

So we are given the equation:

Then let's plug in 4 for all of the a's and 3 for all of the b's:

And then we solve using PEMDAS:

Then if we divide both the numerator and the denominator by 35, we get:

And thus is the most simplified 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.

your answer is -9

step-by-step explanation: