Ted and Mary are selling pies for a school fundraiser. Customers can buy apple pies and lemon meringue pies. Ted sold 10 apple pies and 6 lemon meringue pies for a total of $120. Mary sold 12 apple pies and 12 lemon meringue pies for a total of $192. What is the cost of each apple pie? A. $8
B. $10
C. $6
D. $4

step-by-step explanation:

let

we know that

the y-intercept is the y-coordinate of the point when the value of x is equal to zero

so

the y-coordinate of the point a is the y-intercept

the answer part a) is

the value of y-intercept is

part b) find the slope m

we know that

the value of the slope is equal to

substitute the values

therefore

the answer part b) is

the value of the slope is equal to

the general answer is

the slope is

the value of y-intercept is

you can use a^2+ b^2=c^2