Please help me ^^'

Shari started to use the grouping method to factor the expression x^2 + 5x − 84 as shown.

x^2 + 5x - 84
x^2 + 12x - 7x - 84

Which expression could be the next step in completely factoring the expression?

A. x(x + 12 − 7) − 84

B. x^2 + 12x + 7(x − 12)

C. x(x + 12) − 7(x + 12)

D. x(x − 12) + 7(x − 12)

Mr switzer needs to buy new 1-foot tiles to cover his bathroom floor. the floor is 12 feet long and 8 feet wide. each square foot of tile will cost $1.79. in dollars what will be the total cost of the tiles he needs to buy.

33% of college students say they use credit cards because of the rewards program. you randomly select 10 college students and ask each to name the reason he or she uses credit cards. find the probability that the number of college students who say they use credit cards because of the rewards program is (a) exactly two, (b) more than two, and (c) between two and five inclusive. if convenient, use technology to find the probabilities.

Agroup of randomly selected apple valley high school students were asked to pick their favorite gym class. the table below shows the results of the survey. there are 528 students at apple valley high school. gym class number of students racquet sports 1 team sports 9 track and field 17 bowling 13 based on the data, what is the most reasonable estimate for the number of students at apple valley high school whose favorite gym class is bowling? choose 1 answer a. 9 b. 13 c. 119 d. 172