A boy has only dimes and quarters in his piggy bank. If he has 90 coins worth 12 dollars and 60 cents altogether, how many quarters does he have in his bank? A) 24 B) 25 C) 21 D) 22 E) 23

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days

Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have

Erik buys 2.5 pounds of cashews. if each pound of cashews costs $7.70, how much will he pay for the cashews?