Paula buys a machine for $6600, which includes a sales tax of 20 per cent. Without sales tax, the price is? plse i need help

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

Hannah paid $3.20 for 16 ounces of potato chips. hank paid $3.23 for 17 ounces of potato chips. who paid less per ounces?