What is a multiple of 7 and is also a factor of 7

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.

On the first of each month sasha runs a 5k race she keeps track of her times to track her progress her time in minutes is recorded in the table

At your job you're paid $50 per week plus $3 per sale at least how many saled do you need to make in order to have over $250