Select the two expressions equivalent to the one given below. 5x - (8x + 9) + 4.5x
A.1.5x - 9
B.1.5x + 9
C.-7.5x + 9
D.-8x - 9 + 9.5x

Arestaurant offers a $12 dinner special that has 5 choices for an appetizer, 12 choices for an entrée, and 4 choices for a dessert. how many different meals are available when you select an appetizer, an entrée, and a dessert? a meal can be chosen in nothing ways. (type a whole number.)

Candice uses the function f(t)=t+100−−−−−−√ to model the number of students in her after-school program. the variable t represents days and f(t) represents the number of students. how many days does it take for there to be 15 students in her program? a. 225 days b. 125 days c. 325 days d. 115 days

Me because i don't understand how to do it.: )