7th Grade Math Help. I keep getting a different answer than from the ones on there.

43lbs of tomatos cost $387. how much would 41lbs cost

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 3 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30∘c on monday, but decreased at a constant rate in the next 3 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.

Solve the equation. 2x - 8(x+1)= 6(2x - 3)