• ## A store sells 12-packs of ballpoint pens for \$1.09 each and composition books for \$2.79 each. Cindy buys m packs of ballpoint pens and n composition books. The store offers a 5% discount for every 50th customer who makes a purchase. If Cindy gets the 5% discount, which expression will represent Cindy’s bill? A. 0.05 − 1.09m + 2.79n B. 1.05 + 1.09m + 2.79n C. 1.05(1.09m + 2.79n) D. 0.95(1.09m + 2.79n)

A 5% discount indicates that her total purchase amount will be decreased by 5%. Paying full price could be shown as 1.00, so we must subtract 0.05 from the full price to represent the discounted total (1.00-0.05 = 0.95).Only one choice, D, contains this multiplier so we can be certain of this answer.

• ## Samantha and Luis are attempting to determine how many library books each seventh grade student checks out at the same time. Samantha surveys every other seventh grade student leaving the library. She samples a total of 40 of the 200 seventh graders. Luis samples 30 of the 200 seventh grade students at random in the school cafeteria. Whose sample is the most random? Luis because his sample is taken from the population of all seventh graders Luis because he samples fewer students Samantha because she samples more students Samantha because her sample is taken from the population of students who use the library

She can make 48 cups juice Further Explanation   One variable linear equation is an equation that has a variable and the exponent number is one.   Can be stated in the form:   or   ax + b = c, where a, b, and c are constants, x is a variable   Whereas the

• ## If 7 of the same books cost £84, how many can be brought for £48

Answer with explanation: Membership fee for club members = \$ 30 Ticket Price for for club members =\$ 3 Let , number of Club members = x And,Number of non club members=y Ticket price for non club members= \$ 6 Expressing the above situation in terms of Linear equation   →30x+3x=6y    →33x =6 y