Four values that make the expression factorable will be, 2, -4, -18 and -28.
$30/2=$15.
She charges $15 for one hour
Therefore, she must charge $75 for 5 hours
That is 3 slots
12 in 1st slot
11 in 2nd
10 in 3rd
so that is 12*11*10 or 1320 ways
10 km in .5 hour. Since it is the same as 20 km in 1 hour. Multiplied by 2.
20 is greater than 15.
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