10. For the following questions, use the system of equations (1 point each): 3x +2y = 14
2x - 4y = 4

a. Solve the system of equations using either the substitution method or the multiplication/addition method.

b. Check your solution by writing the system as a matrix equation and using the inverse matrix

How do I use the inverse matrix?? ​

look at the picture.

y-intercept for the function on a picture is 4 → point (0, 4).

y-intercept for the function

is for x = 0. substitute:

y-intercept is 8 → point (0, 8).

the revenue of the fitness center, y, is the product of two factors: the number of members and the fee paid by each member. there are 320 members now, but number of members goes down by 10 for each $5 increase in fees, so if x is the number of $5 price increases then members is equal to (320 - 10x). since the fee is currently $45, and the fee increases by $5 for every price bump x, the fee is given by (45 + 5x). so, revenue y is given by y = (320 - 10x)(45 + 5x).