Henry's calculator is 2 1⁄4 inches wide and 5 1⁄4 inches long. What is the area of the calculator?

I just don't understand how to do this
so please help me

Which ordered pair (c,d) is a solution to the given system of linear equations- c+2d=13 -9c-4d=-15

Graph y ≥ -x^2 - 1. click on the graph until the correct graph appears.

Select 2 statements that are true about the equation y+6=-10(x-3).1) the slope of the line is -102) the slope of the line is 33) one point on the line is (3,6)4) one point on the line is (3,-6)