How many solutions does this system have? x minus y = negative 4. 3 x + y = 8. one two an infinite number no solution

Can someone me with my hwplz(only the circled ones)

1. a right triangle is graphed on a coordinate plane. find the length of the hypotenuse. round your answer to the nearest tenth. 2. use the angle relationship in the figure below to solve for the value of x. assume that lines a and b are parallel and line c is a transversal.

How many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.