What is the formula to find out the gradient on a line graph

The length and width of a rectangle are consecutive even integers the area of the rectangle is 120 squares units what are the length and width of the rectangle

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

Tom travels between the two mile markers shown and then finds his average speed in miles per hour. select the three equations that represent this situation.