50 points 1. which set of steps shows the solution to the equation 4y = −12? (5 points) y = −12 − 4; y = 8 y = −12 ÷ (−4); y = 3 y = −12 − (−4); y = −8 y = −12 ÷ 4; y = −3 2. which statement is true for the equation 3x − 3x − 2 = −2? (5 points) it has no solution. it has one solution. it has two solutions. it has infinitely many solutions.

What is the factored form of x2 − 4x − 5? (x + 5)(x − 1) (x + 5)(x + 1) (x − 5)(x − 1) (x − 5)(x + 1)

The angles below are supplementary. what is the value of x? a pair of supplementary angles is shown. one angle measures 7x + 33, and the other angle measures 70. 5.3 8.14 11 14.7

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.