PLEASE HELP :) THANKS There is a sales tax of $6 on an item that costs $64 before tax. The sales tax on a second item is 8.25. How much does the second item cost before tax?

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.

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Rick and jim are working at the concession stand at the school basketball game. rick sells 12 more burgers than jim. the equation given below shows this relationship, where g represents the number of burgers rick sells, and h represents the number of burgers jim sells. g= h + 12 if rick sells 37 burgers, how many burgers does jim sell?