The student messed up on step one. The proper factoring is (x-4) (x+2)
The answer is 40 miles per hour.
Hey there!
We can condense 18 to 9 times nine. However, 9 isn't prime, so we can break that down to 3 times 3 times two, all of which are prime.
Hopefully this helps!
150 degrees because supplementary angles add up to 180 degrees
