Every morning jenna empties her pockets and puts her change in a jar. at the end of the week she counts her money. one week she had 40 coins, all of them dimes and quarters. when she added them up, she had a total of $7.75. l let d = number of dimes and q = number of quarters how many dimes did jenna have ?

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?

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.

If f(x) = -5x + 1 and g(x) = x3, what is (gºf)(0)? enter the correct answer