Rob is saveing to buy a new mp3 player for every 14 dollars he earns babysitting ,he saves 5 dollars on saturday rob earned 84 dollars babysitting how much money did he save .

Rob saved $30 to buy new Mp3 player.

Step-by-step explanation:

Given:

Rob is saving money to buy a new Mp3 player.

For every $14 earned he saved $5.

For 14 dollars earned = Money Saved $5

Total money earned in babysitting = $84  

We need to find Total money he saved.

Now 14 dollars earned = Money Saved $5

So 84 Dollars earned = Total Money saved

We will use Cross Multiplication method to find the Total Money saved.

Total Money Saved =

Hence Rob saved $30 to buy new Mp3 player.

sine

step-by-step explanation:

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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step-by-step explanation: