What is the value of x in the equation 4x+8y=40, when y=0.8?

The rectangle shown has a perimeter of 108 cm and the given area. its length is 6 more than five times its width. write and solve a system of equations to find the dimensions of the rectangle.

The points (1, 7) and (0, 2) fall on a particular line. what is its equation in slope-intercept form?

The function f(x)= x5+ ( x + 3)2 is used to create a table. if x = -1 then what is f(x)?