5) Joy and Cullen put some money into their money boxes every week. The amount of money (y), in dollars, in their money boxes af
ter a certain amount of time (x), in weeks, is shown by the equations below: Joy: y = 30x + 20 Cullen: y = 20x + 90 a) After how many weeks will Joy and Cullen have the same amount of money in their money boxes?
b) What is that amount?
Week 7 And the amount is 230$ You can check it by getting a Graphing Calculator and Inserting the Equations into y= And Go down the list where x=7 and the two variables are the same Number
P ( x ) = x³ - 4 x² + 3 x - 12 = = x² ( x - 4 ) +3 ( x - 4 ) = ( x - 4 ) · ( x² + 3 ) x - 4 = 0, x = 4 x² + 3 = 0, x² = - 3 ( there is no real solution ) Answer: In 4 years the company will break even.
