#2: Her earnings were no more than $64. Let e represent her earnings. E is less than or equal to 64 (since it says no more than $64).
e ≤ 64.
#4: A checking account was no more than $500. Let a represent the amount in the checking account. A is less than or equal to 500.
a ≤ 500.
#5: Max. ceiling height of 8 ft is required. Let f represent length in feet. Length in feet has to be less than or equal to 8.
f ≤ 8.
#6: Min. number of 12 participants required. Let n represent the number of participants. There has to be at LEAST 12 participants. So, the number of participants has to be greater than or equal to 12.
The greatest common factor is the term in which the variable is raised to the lower power. this can be factored out of all terms, and is the greatest factor that can do so.