A sophomore class at a high school sells candy bars. The total cost, C(x) , of buying x amount of candy bars is represented by the equation selling x C(x) = 21x - 10 10. The revenue, R(x) , from amount of candy bars is represented by the equation R(x) = 602 . The total profit, P(x) , is represented by the equation P(x) = R(x) - C(x) . For R(x) and C(x) given above, what is P(x) ?

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.

1/3 + 1/3 ≠ 2/6 because 1/3 alone = 2/6  

step by step explanation:

1/3 + 1/3 = 2/3       2/3=4/6

5

step-by-step explanation: