Answer:
The cost of parts was $65.
Step-by-step explanation:
Let the cost of parts = x
35 + 21(3) + 1.10x = 169.50
98 + 1.10x = 169.50
71.50 = 1.10x
71.50/1.10 = 65
Answer: A
Step-by-step explanation:
The contrapositive of a statement is logically equivalent to the original statement.
Check the picture below, let's use those two points on the line to get its slope.

6 / 9 = 2/3 ( since dividing top and bottom be 3 gives 2/3)
Also 4/6 = 2/3