In a certain guessing game , each player begins with 40 coins. A player loses 3 coins when he or she makes an incorrect guess. When a player runs out of coins, the player is out of the game. The last player with coins remaining wins the game. If the y-value is the number of coins remaining and the x-value is the number of incorrect guesses, the 40 coins would represent what value in a graph ?

Solve: 3x+y=6 4x-2y=18 show all work !

The linear combination method is applied to a system of equations as shown. 4(.25x + .5y = 3.75) → x + 2y = 15 (4x – 8y = 12) → x – 2y = 3 2x = 18 what is the solution of the system of equations? (1,2) (3,9) (5,5) (9,3)

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.