Aclerk has 1/2 book of stamps on monday. on tuesday, he used 1/10 of the book of stamps. how much of the book of stamps is left? a 3/10 of the book b 2/5 of the book c 3/5 of the book d 9/10 of the book

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?

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

Quadrilateral abcd is a parallelogram with diagonals that intersect at point e. which of the following statements is true?