Is 2.5(3+x ) equivalent to 2.5x + 7.5

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

What is the difference between the equations of a vertical and a horizontal line?

Acampus club held a bake sale as a fund raiser, selling coffee, muffins, and bacon and eggs sandwiches. the club members charged $1 for a cup of coffee, 3$ for a muffin , and $4 for a back. and egg sandwich. they sold a total of 55 items , easing $119. of the club members sold 5 more muffins than cups of coffee, how many bacon and egg sandwiches he’s did they sell