Elliot has a total of 26 books. he has 12 more fiction books than nonfiction books. let x represent the number of fiction books. which equation represents the situation? x = x+ 12x + (x – 12) = 26x + (x + 12) = 26 how many fiction books does elliot have? 71219 how many nonfiction books does elliot have?

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.