The cost c (in dollars) of making n watches is represented by c=15n + 85. how many watches are made when the cost is $385?

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

Maria donates a fixed amount, a, to a charity each month. if she donates $300 in 12 months, what is the equation for a? a. a + 300 = 12 b. a × 300 = 12 c. a × 12 = 300 d. a + 12 = 300 e. a + 32 = 100

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x