Joe has 18 more than 4 times the number of toy cars as Marcia. Joe has at least 86 toy cars. What solution represents the number of toy cars, c, Marcia can have?

7x+8y=-18, 4x-9y=-3 solve the system of equations

16. you're planning to buy a boat, a motor, and some miscellaneous boating equipment. the boat costs $325, the motor costs $225, and the equipment costs $79. if you've saved $438 toward these purchases, how much more do you need to save? a. $181 b. $281 c. $291 d. $191

Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)