If using the method of completing the square to solve the quadratic equation a? +2+9 = 0, which number would
have to be added to complete the square"?

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.

Three times the sum of a number and seven is negative thirty-six. what is the number?

The measure of an angle is 117°. what is the measure of a supplementary angle?