Joe was comparing sale prices of two stores at the mall to decide where to buy his new jeans. The two stores' sale banners are shown below. if Joe plans to buy 1 pair of jeans, which store offers a better deal after the discount?

Can someone me and explain..will award brainlest!

The students at jefferson middle school are raising money for a charity by selling t-shirts and hats. the number of t-shirts sold was 3 times the number of hats. the profit was $5 for each t-shirt sold and $2.50 for each hat sold. the students raised $840 for the charity. they used the system below to analyze their success and found the solution to be (144, 48). 5x+2.50y=840 x=3y how much did they earn from t-shirt sales?

Find the value of x to the nearest tenth.