If she wants to frame a square painting with an area of 400 square inches, all you would have to do is to find the square root of 400, which is 20. Thus, each side is 20 inches long.
If you have to set an equation up, it would simply be:
c
Step-by-step explanation:
2(3- x) - 12 + 4x=?
=6-2x-12+4x
=2x-6
Using pythagorean theorem :
Answer: about seven
Start with the given formula for the surface area of a sphere.
Now substitute 2x + 5 in for r, the radius.
Then simplify the expression and write it in standard form.