Here are two steps from the derivation of the quadratic formula.(x+b/2a)^2=b^2-4ac/4a^2 x+b/2a=+sqrt b^2-4ac/4a^2 what took place between the first step and the second step?

a. taking the square root of both sides b. factoring a perfect square trinomial c. completing the square

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.

Which number completes the inequality? 2/3 < _ < 7/9

How many heads would you expect if you flipped a coin twice? first, fill in the table below with the correct probabilities. hint: the sample space for flipping a coin twice is {hh, ht, th, tt}. a = b = c = f