10) The GCF of a set of numbers is the largest number that divides into both numbers.
The GCF of 24 and 36 is 12.
15) 
can be simplified by dividing the top (numerator) and the bottom (denominator) by the GCF. The GCF of 30 and 54 is 6. The new fraction is 
. 6/9
20) The GCF of 
is 11. The new fraction is 
. 5/8
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Answer:
6.58 has the greatest value
6.362 < 6.5 < 6.537 < 6.58
S = 60W + 650 <== ur equation
after 18 weeks...so sub in 18 for W
S = 60(18) + 650
S = 1080 + 650
S = 1730 <==
