What value completes the square for the expression?

x2 - 18x

A. 9

B. - 9

C. 81

D. - 81

A new, trendy department store is experiencing exponential growth across America. The chain began in 2004 when it opened 16 stores in Texas. Since then, it has grown by 35% in new store openings each year.

Multiply (6 + 2i) (6 - 2i)

How many grains of sand are in a 10kg bag

Is 0.212121 ... natural number, whole number, integer, rational number, irrational number

What is the range of the relation (-3,6), (5,2), (-1,-5), (6,-3) ?

A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporters data is valid or not?

I am very confused on how to figure out if y = 3/4x is proportional?

Alison wants to buy a mountain bike for $339.12. If she saves $28.26 each month, in how many months will she be able to buy the bike?

At 12 o'clock the temperature was 7°C. The temperature decreased by - 20°C. What is the new temperature?

Ashleys rentals charges $27.50 per hour to rent a surfboard and a wetsuit. Darlas surf shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit.