Solve the system of equation 2x+3y=40 and -2x+2y=20

a. x=-6,y=4

b. x= 2 y=12

c. x=10,y=20

d. x=-10,y=20

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.

Need ! the total ticket sales for a high school basketball game were $2,260. the ticket price for students were $2.25 less than the adult ticket price. the number of adult tickets sold was 230, and the number of student tickets sold was 180. what was the price of an adult ticket?

The following hormone had their receptors in the cell membrane except a-insulin b-tsh c-gh d- cortisol