Ben bought a digital camera for $90 the tax rate is 6% which proportion can be used to find the amount of tax ben will pay

Pls i’m too dumb to know what i’m doing right now

Complete the solution of the equation. find the value of y when x equals to 1 9x-5y=29

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.