Mark is 4 year older than 2 times his sister helena's age. let h represent helena's age and m represent mark's age. write an equation to represent mark's age. glenn is 6 years younger than 3 times his brother john's age. let g represent glenn's age and let j represent john's age. write an equation to represent glenn's age. strawberries sell for $3.35 per pound and bananas sell for $0.80 per pound. mrs. mac bought some strawberries and some bananas to make smoothies for her friends. mrs. mac spent a total of $11.75. write an equation to represent this situation.