Mary invests 18000, putting part of the money (x) into a savings account paying 5% annually and the rest in an accountpaying 8% annually. A- If Mary invests x dollars at 5%, write an equation that describes total interest received from both accounts at the end ofthe year. B- Use you grapher to generated a table of values for Interest to find out how much Mary should invest at 5% to earn 1185 dollarsinterest in one year.

ahredent89

ahredent89

Answered question

2022-08-06

Mary invests 18000, putting part of the money (x) into a savings account paying 5% annually and the rest in an accountpaying 8% annually.
A- If Mary invests x dollars at 5%, write an equation that describes total interest received from both accounts at the end ofthe year.
B- Use you grapher to generated a table of values for Interest to find out how much Mary should invest at 5% to earn 1185 dollarsinterest in one year.

Answer & Explanation

Jaiden Gould

Jaiden Gould

Beginner2022-08-07Added 11 answers

x = amount invested at 5%
18000 - x = amount invested at 8%
Interest earned = .05x + .08(18000 - x)
Put the equation into y(x) on your graphing calculator andscroll through the table until you have a y value close to 1185. The x value that matches up will be the amount thatshould be invested at 5%.

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