Imay be like 12 weeks in, but i still need with coefficients and what they are. (btw my state does not use common core method.)

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.

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.

Annabelle's homework is 75% it took her three hours how long should she estimate it will take her to complete her homework.