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Part A

x = number of kilowatt-hours used

4x = represents the company charging Php 4 per kilowatt-hour

4x+8 = add on the base rate of Php 8. This represents the monthly cost

Part B

We simply stick a "y=" in front to turn the expression into an equation. Specifically, this is a linear equation in slope-intercept form.

slope = 4, y intercept = 8

Part C

Plug in x = 0 to compute y

y = 4x+8

y = 4*0+8

y = 0+8

y = 8

Part D

Instead of replacing x, we'll replace y with a number this time.

We'll use y = 1000 since this is the given bill. We want to find how much electricity used (in kwh) that will lead to this bill.

y = 4x+8

1000 = 4x+8

4x+8 = 1000

4x = 1000-8

4x = 992

x = 992/4

x = 248

Part E

This is very similar to part C. Instead of x = 0, we'll use x = 150

y = 4x+8

y = 4*150+8

y = 600+8

y = 608

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer