How is the sentence 15 more than x is 5 written as an equation

Can someone me find the original price? the discount is 5% and the sale price is $68.40

Given a binomial distribution variable with n=20 and p=0.60 find the following possibilities using the binomial table a) p(x < 13) b) p x > 15) c) p(x = 17) d) p(11 < x < 14) e) p(11 < x < 14)

Which net represents the pyramid below? meh