2) There are 38 numbers on an American roulette wheel, the numbers 1 through 36 plus 00 and 0. There are 18 red numbers, 18 black numbers, and two green numbers. If you bet $10 that the ball lands on a
red number, you will win $10 if it does. Otherwise you lose. Suppose a certain casino has a rule that if
the ball lands on a black number you lose your entire $10 bet, but if the ball lands on a green number
you only lose half your bet, or $5. What is your expected value in playing this version of roulette?

x=-7

step-by-step explanation:

x+3=-10

-10+3=-7

x=-7

hello from mrbilldoesmath!

answer:   x (x+6)^2, choice b

discussion:

factor x out of the equation:

x^3 + 12x^2 + 36x = x (x^2 + 12x + 36).

note that 6+6 = 12 and 6*6 = 36 so the above factors into:

x (x+6)^2

which is choice b

you,

mrb

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