The first equation from the previous system of equations is graphed. Graph the second equation to find the solution of the system of equations. y = -2x + 4 1 y = -5x-1 3 What is the solution to the system? (0,4) (0, -1) (3,-2) (2,-1)​

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

Combine like terms to make a simpler expression 3z+z

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.