A bank records deposits as positive numbers and withdrawals as negative numbers. Mike withdrew $60 from his bank account 3 times. What is the change in Mike's account balance after all withdrawals? a) write the setup (the expression) b) answer as an integer c) answer in a sentence

-$180

Step-by-step explanation:

Mike withdrew $60 from his bank account 3 times.

The bank record withdrawals as negative numbers

a) write the setup (the expression)

= -$60 * x

= -$60x

Where x = number of times Mike withdrew

b) answer as an integer

-$60 * 3

= -$180

c) answer in a sentence

$60 * 3

= -$180

= Negative $180 or minus $180

answer: a video game has three difficulty levels: easy, medium, and expert. the game's scoring works in such a way that a player has to score a fixed number of points to advance to the next level, and then the scoring starts over. the total score needed to clear all three difficulty levels is 7,500. two times the number of points needed to clear the easy level is 500 more than the number of points needed to clear the medium level. twice the number of points needed to clear the medium difficulty level is 1,500 more than the number of points needed to clear the expert level. if x, y, and z represent the easy, medium, and expert levels, respectively, and a is the coefficient matrix of the system of equations modeling this situation, identify the inverse matrix, a-1, and the solution matrix, x, of the system of equations.

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