What does it mean that the costumer data are numerical and univariate

Atheater wants to build movable steps that they can use to go on and off the stage. they want the steps to have enough space inside so they can also be used to store props. how much space is inside the steps?

Complete the solution of the equation. find the value of y when x equals to 28 x+3y=28

Graph the equationy=x^2 -[tex]y = x^{2} - 2[/tex]