An electronic repair shop offers three types of service: on-site at-store and by mail. On site service costs 3 times as much as at-store service. By mail service costs $10 less than at store service. Last week the shop completed 15 services on site, 40 services at store and 5 services by mail for total sales of $2650. PART A: define variables for each service

PART B: write systems of equations for the services

PART C: Determine the cost of one on site repair service (SHOW ALL YOUR WORK)

PLEASE HELP ILL MARK BRAINLIEST DUE BY 11:59 P. M.

b. an equilateral triangle inscribed in a circle

step-by-step explanation:

we are given the figure of two circles having a triangle inside.

now, we know that,

"when a figure is lying inside an another figure, then the outside figure is known as circumscribed figure and the figure lying inside is referred to as the inscribed figure".

as we see that, the circles are containing the triangle completely.

thus, the circles are the circumscribed figures and the triangle is the inscribed figure.

hence, we get, 'an equilateral triangle is inscribed in a circle'.

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).