I need help asap . find an equivalent expression for the missing side length of a rectangle. then find the missing side length when x=3. round to the nearest tenth of an inch.

Matt and brian were solving a system of equations. they both noticed that the two lines had the same slope. brian said that because each line in the system had the same slope, the two lines had to be parallel, which meant the solution to the system was "no solution" matt disagreed, and said they should also look at the y-intercepts before determining how many solutions there were. who is correct?

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

When x = 3 and y = 5, by how much does the value of 3x2 – 2y exceed the value of 2x2 – 3y ?