Simplify (4/5-2). ignore this it has to be 20 characters to work

What is the value of x? enter your answer in the box. photo attached.

In two or more complete sentences, formulate how to use technology to calculate the appropriate regression model for the given data. you are not required to find the model, just choose the appropriate regression and explain how to use the technology. (-5,,2.,0.8), (0,-0.5), (2,-1.3), (3,-0.8), (5,2)

What is the solution of the systems of equations? y=2/3x+3 x=-2