Alexis has a steady babysitting job over the summer. She starts out with $50 by the end of the first week and earns $30 each week. She thinks it will take her 7 weeks to have enough money to buy a $200 iPhone. Is she correct? Justify your answer using complete sentences and proper grammar.
y = 30x + 50 200 = 30x + 50 200 - 50 = 30x 150 = 30x 150/30 = x 5 = x
Alexis is not correct. If she starts with $50, and earns $30 per week, it will take her only 5 weeks to come up with the $200 to buy the iphone. If she waited 7 weeks, she would have $260 instead of $200.
