Determine if the system of equations are intersections parallel or collinear

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

Graph y = -|x| + 2. click on the graph until the correct one appears.

List x1, x2, x3, x4 where xi is the left endpoint of the four equal intervals used to estimate the area under the curve of f(x) between x = 4 and x = 6. a 4, 4.5, 5, 5.5 b 4.5, 5, 5.5, 6 c 4.25, 4.75, 5.25, 5.75 d 4, 4.2, 5.4, 6