You will have to set up a system of equations
ANSWER:
We have to find new side-lengths of PQR triangle.
Original sides are.

After multiplying by 2.5 we get

These are the new sides of the P'Q'R' triangle.
<u>24</u> = <u>30</u>
x = 100
<u>30x</u> = <u>2400</u>
30 = 30
x = 80
For the first question the answer would be the first quadrant
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Well 5 1/4 hours is 5 hours and 15 minutes and 2/3 of 5 hours and 15 minutes or 315(5*60+15) is 210
hope it helped