A ramp is used to help a person in a wheel chair up some steps that are 75 cm high. The person and chair together weigh 800 N. The greatest force that the person can exert is 200 N. Find the minimum length of the inclined plane that is required.

Adaycare center charges a $75 enrollment fee plus $100 per week. which of the following represents the cost of sending a child to daycare for 14 weeks?

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?

What is the value of x when x + 7 = 21?