Answer:
The sale price is 153
Step-by-step explanation:
Find the discount
170 *10%
170 *.10
17
Take the discount from the original price
170-17
153
The parabola's line of symmetry is the x-axis.
Sam made a mistake, and their correct value is 30.
4j^2 -14j +14j - 49
4j^2 - 49
