Let’s call the speed of the slower car S, then the speed of the other is S+10mph.
At 5pm they have been travelling for 3 hours. The slower car travels a distance 3S and the faster one 3(S+10).
But the two distances must add up to 240 miles so 3S+3(S+10)=240, 3S+3S+30=240, 6S=210, S=35 mph. The faster car’s speed is 45mph. We can see that 3S is the same distance as 3x, so x=S=35 mph, and the distance the faster car travels is 3×45=135 miles.
Google on the word SCALAR. that's the word your looking for
Commen factor means you can get integers after division.
A. 20 is not correct
B. Correct
C. Correct
D. 56 is not correct
$520. I think it is since 52 is 10% of 520. Hope this helps
