Answer:
5
Step-by-step explanation:
Pythagorean Theorem States: 

9+16=25
=5
Answer:
yes 10x+15 is equivalent to 5(2x+3)
Step-by-step explanation:
Answer:
A'(5, -3)
Step-by-step explanation:
Reflection over the x-axis changes the sign of the y-coordinate:
(x, y) ⇒ (x, -y)
A(5, 3) ⇒ A'(5, -3)