What is an equivalent expression to 9y+y

If jm equals 5x -8 and lm equals 2x -6 which expression represents jl

Mustafa contributes 11% of his $67,200 annual salary to his 401k plan. what is his pretax income

Arianna is buying plants for her garden. she buys 15 flowering plants for $96. pink flowering plants sell for $8, and purple flowering plants sell for $5. how many pink flowering plants did arianna buy? i figured out the answer! the answer is 7. 8x +5y = 96 plug in 7 for x 8 (7) + 5y = 96 56 + 5y = 96 subtract 56 from both sides 5y/y = 40/5 y = 8 she bought 7 pink and 8 purple plants