Mary had 21 dollars to spend on 2 notebooks. after buying them he had 13 dollars. how much did each notebook cost?

Which situation can be modeled by the inequality 5 + 10w ≥ 45? a. you start with $5 and save $10 a week until you have at least $45. b. you start with 5 baseball cards and purchase 10 cards every week until you have at most 45 cards. c. you start with 5 water bottles and purchases cases of 10 water bottles each until you have a total of 45 water bottles. d. you spend $5 plus $10 per week until you have less than $45.

The price of a car has been reduced from $19,000 to $11,590. what is the percentage decrease of the price of the car?

Find a third-degree polynomial equation with rational coefficients that has roots -2 and 6+i