Rewrite the equation:
0=x^2+4x+1

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.

Asystem of equations has 1 solution.if 4x-y=5 is one of the equations , which could be the other equation ?

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?