In the general population, what is the probability that an individual will have the birth defect, assuming that maternal and paternal genes

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?