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?

Given ab and cb are tangents of p, and m =10°. what is the measure of abp?

Write the summation to estimate the area under the curve y = 1 + x2 from x = -1 to x = 2 using 3 rectangles and right endpoints

Sophia wrote an equation to represent the revenue of a movie theater for one day. she let x represent the number of child tickets sold and y represents the nunver of adult tickets sold. if a child ticket cost $4, an adult ticket cost $6, and the total revenue for the daybwas $420, which equation could sophia use to represent the number of chikd and adult tickets that were sold?