Help me please ASAP I need help

What are the solutions of the following system? y=-2x^2 y=x-2

Why is 4.125 + the square root of 3 irrational

The perimeter of a rectangle is 40 inches. the table shows some of the possible dimensions for the length and area of the rectangle. length (inches) area (square inches) 2 36 7.5 93.75 10 100 12.5 93.75 18 36 given that the area of the rectangle is dependent on the length of its sides, which graph could best be used to display the relationship shown in the table?