Amy bought 3 pounds of lemons at 2$ per pound, a box of rice for 4$ and 7 frozen dinners for 3$ each what is the change in the amount of money she has

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

What is the value of the discriminant of the quadratic equation -2x = -8x + 8 and what does its value mean about thenumber of real number solutions the equation has?

Jackson earns $25 per hour as a tutor at the college library. he set a weekly spending budget of $130 each week and puts the remaining money in his savings account. how many hours must he work this week to have at least an extra $50 to put in his savings account