Answer:
Equation : y = 4x + 55.50
x = 1.9 gigabytes
Step-by-step explanation:
Given that:
Flat fee per month = $55.50
Cost per gigabyte = $4
Let,
x be the number of gigabytes.
y be the total cost
y = 4x + 55.50
Lily wants to keep her bill $63.10
63.10 = 4x + 55.50
63.10 - 55.50 = 4x
4x = 7.60
Dividing both sides by 4
Hence,
Equation: 4x+55.5=63.1
Answer: x=1.9
C.
use the pythogorean theorem a^2 + b^2 = c^2
530.66 square cm
A=pi*r^2
A=pi*13^2
A=530.66
use point slope form
y=mx+b