Answer:
180
Step-by-step explanation:
20×9=180
Answer: x=2 y=18
Step-by-step explanation
The second set. It contains (2,2) and (2,7), so it fails the vertical-line test.
8a + 24
Use Distributive property: a(b +c) = a*b + a*c
Here a = 8 ; b= a & c = 3
8(a + 3) = 8*a + 8*3
= 8a + 24