13. if you are randomly sampling one at a time with replacement
from a bag that contains eight blue marbles, seven red marbles,
and five green marbles, what is the probability of obtaining
a. a blue marble in one draw from the bag?
b. three blue marbles in three draws from the bag?
c. a red, a green, and a blue marble in that order in three draws from the bag?
d. at least two red marbles in three draws from the bag?

What is the common difference in the following arithmetic sequence? 7,3,-1,-5

Aclothing store has the sign shown in the shop window. pani sees the sign and wants to buy 3 shirts and 2 pairs of jeans. the cost of each shirt before the discount is $12, and the cost of each pair of jeans is $19 before the discount. write and simplify an expression to find the amount pani pays if a $3 discount is applied to her total

Three friends went on a road trip from phoenix, az, to san diego, ca. mark drove 50 percent of the distance. jason drove 1/8 of the distance. andy drove the remainder of the distance. 1. andy thinks he drove 1/4 of the distance from phoenix, az, to san diego, ca. is andy correct? 2. the distance from phoenix, az, to san diego, ca, is 360 miles. how many miles did each person drive? 3. solve the problem. what is the answer in total?