Which equations support the fact that rational numbers are closed under subtraction? select all that apply. 4.5 - 0.5=4 √8 - √8=0 2√3 - √3=√3 5√4 - √4 = 4√4

Hillel is juggling flaming torches to raise money for charity. his initial appearance raises $500\$500 $500 , and he raises $15\$15 $15 for each minute of juggling performance. the amount rr r of money hillel raises is a function of tt t , the length of his performance in minutes. write the function's formula.

Angela is buying a dress that is on sale for 20% off. if the original price of the dress is $40.00, how much money is angela saving on the dress? a. $0.80 b. $3.20 c. $32.00 d. $8.00

What is the value of f(x) = 2.2 for f(-2)?