Sianna bought 3 pens, 4 notebooks, and a calculator. the calculator cost $25. if x represents the cost of each pen and y represents the cost of each notebook, which expression represents the amount of change sianna should receive from $50?
*3x + 4y +25
*50 – (3x + 4y)
*50 – (3x + 4y + 25)
*3x + 4y + 25 + 50

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x

Hurrya vegetable garden and a surrounding path are shaped like a square that together are 11ft wide. the path is 2ft wide if one bag of gravel covers 9 square feet how many bags are needed to cover the path

Afamily has two cars. the first car has a fuel efficiency of 25 miles per gallon of gas and the second has a fuel efficiency of 15 miles per gallon of gas. during one particular week, the two cars went a combined total of 1025 miles, for a total gas consumption of 55 gallons. how many gallons were consumed by each of the two cars that week?