Oliver is trying to solve the following equation by completing the square. x2−32x+31=0 Here are the steps Oliver used to complete the square. Original equation: Line 1: Line 2: Line 3: Line 4: Line 5: Line 6: x2−32x+31x2−32xx2−32x+32(x−16)2(x−1 6)2−−−−−−−−√x−16x0−31−31+3211–√±115 and x=17 Oliver did not get the correct solutions. Which line contains Oliver's first mistake?

Dropping less than two inches per mile after emerging from the mountains, a river drains into the ocean. one day's discharge at its mouth, 5.6 trillion gallons, could supply all of country a's households for seven months. based on this statement, determine how much water an average household uses each month. assume that there are 100 million households in country a. country a uses approximately nothing gallons per household per month.

Which sum or difference identity would you use to verify that cos (180° - ∅) = -cos ∅? a. sin (α -β) = sin α cos β – cos α sin β b. cos (α -β) = cos α cos β – sin α sin β c. cos (α -β) = cos α cos β + sin α sin β d. sin (α + β) = sin α cos β + cos α sin β

Which of the following is most likely the next step in the series? a3z, b6y, c9x, d12w, е15v, f18u