Hộp 1 chứa 3 bi trắng, k bi đỏ, 15 bi xanh. Hộp 2 chứa chứa 10 bi trắng, (k +1) bi đỏ, 9 bi xanh. Lấy ngẫu nhiên từ hộp 1 ra 2 viên bi, hộp 2 ra 1 viên bi. Tính xác suất để Lấy được 1 bi đỏ

Lấy được ít nhất 1 bi xanh.
k là số 8

The manufacturer of a new product developed the following expression to predict the monthly profit, in thousands of dollars, from sales of the productwhen it is sold at a unit price of x dollars.-0.5x^2 + 22x - 224what is represented by the zero(s) of the expression? a. the profit when the unit price is equal to 0b. the unit price(s) when the profit is equal to 0c. the profit when the unit price is greatestd. the unit price(s) when profit is greatest

The base of a triangle exceeds the height by 9 inches. if the area is 180 square inches, find the length of the base and the height of the triangle.

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?