John has 12 marbles of different colors, including one red, one green, and one blue marble. in how many ways can he choose 4 marbles, if exactly one of the chosen marbles is red, green, or blue?

What is the expression in factored form? -20x^2 - 12x a. 4x(5x+3) b. -4x(5x-3) c. -4(5x+3) d. -4x(5x+3)

X+y=-4 x-y=2 use elimination with adding and subtraction

Suppose that the price p, in dollars, and the number of sales, x, of a certain item follow the equation 4 p plus 4 x plus 2 pxequals56. suppose also that p and x are both functions of time, measured in days. find the rate at which x is changing when xequals2, pequals6, and startfraction dp over dt endfraction equals1.5.