For #7 - part a: greatest common factor (GCF) is 5.
Part b: cross out everything BUT 10 & 20.
The cost of dryer is $450 and the cost of washer is $412
25:169 can be if is a rectangle ( times by the number itself )
or is is a square times by 2 ( 10/26)
-2 is the answer! Remove the parentheses then move the terms. After that, collect the terms and calculate. Lastly, divide both sides.
