Dena has a coupon for 20% off a single purchase at a store. if the item she buys cost p dollars, then the amount she will be charged is represented by the expression below.
p-0.2p
a.-0.2p
b.0.8p
c.1.2p
d.1.8p

Solve the system by the elimination method. 2x + y - 4 = 0 2x - y - 4 = 0 when you eliminate y, what is the resulting equation? a.x = 0 b.4x = -8 c.4x = 8

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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.