Find the side length s of the square. when your answering, explain too. like probably the formula

21

Step-by-step explanation:

A = s^2

You need to find the square root of the area which is the square root of 441.

What number do you multiply by itself and get 441?

Try 15: 15^2 = 15 * 15 = 225     too low

Try 18: 18^2 = 18 * 18 = 324    still too low

Try 20: 20^2 = 20 * 20 = 400    still low but getting closer

Try 21: 21^2 = 21 * 21 = 441   this is it

s = 21 cm

the slope of the line is 60

one point on the line is (40,10)

step-by-step explanation:

in the equation outside the parenthesis the equation always tells you the slope. in this case it is 60.

in the parenthesis is also says 40 which is x because it is near the x and 10 is y because it is near y.