Complete the square on the following quadratic

x^2+22x+9=0

what value is added to both sides of the equation.

Using data from 2010 and projected to 2020, the population of the United Kingdom (y, in millions) can be approximated by the equation 10.0y - 4.55x = 581 where x is the number of years after 2000. In what year is the population predicted to be 71.

The polygon angle sum theorem states that the sum of the measures of the interior angles of an n-gon is

Shoe sells for a certain company were $25.9 billion. sales are expected to increase by about 20% in the next year. find the projected amount of shoe sales next year

Ads galore makes posters with standard dimensions of 81/2 inches by 11 inches. Both length and width of the poster may vary 1/20% according to the ads galore's regulations.

1: - (5x + 7) + 1 = - 5x - 5 2: 4x - 7 + 2x = 2 (3x - 3) - 1 3: - 4x - 2 = - 2 (1 - 4x)

If a truck gets 14 mile to the gallon on average, how much does carbon dioxide is emitted into the atmosphere when the truck travels at 200 miles?

5x-5 + (6y-4) + 4x+10=180

A car went 120 miles in 3 hours. At this rate how long will it take for the car to travel in 350 miles

If you have a test average of 92 and a standard deviation of 1.8, you generally do well on test. true or false

Karla went shopping and bought a dress for 5 1/2 dollars and a skirt for 2 3/5 dollars / If she paid for the clothes with a $20. how much money did she have left? how do I solve the problem using an equation or model