Which expression is equal to - 2i (-9 6i)

a. - 12 18i

b. 18-12i

c. 12 18i

d. 18 12i?

How can I list 2.3, 2 4/5, 2.6 in order from greatest to least

A Greenland whale can hold its break three times as long as a beaver, and a hippopotamus can hold its breath for five minutes long than a beaver.

Maria will use a 1 fourth-gallon pitcher to fill an empty 2 thirds-gallon jug for her lemonade stand. How much lemonade will she need in order to completely fill the jug? A. between 1 and 2 full pitchers B. between 2 and 3 full pitchers C.

Subtract 2x 2 - 6x - 4 from 4x 2 - 4x + 3.

18,472 round to the nearst ten thousand

At smith mountain lake boat rentals, it cost $25 per hour to rent a pontoon boat, plus a one-time charge for cleaning. The Bengel family rented a boat from 11 am - 6:30 pm and paid $226.50.

Which system of equations has infinitely many solutions? A) 6x + 3y = 12 3x + y = 9 B) 2x + 3y = 6 4x + y = 8 C) 12x + 9y = 6 4x + 3y = 6 D) 5x + 10y = 20 2x+4y=8

A square orange rug has a yellow square in the center. The side length of the yellow square is x inches. The width of the orange band that surrounds the yellow square is 11 in. What is the area of the orange band?

Can the function f (x) = x²-4x+4 be factored? If so, write the factored form.

A manatee eats the equivalent of about 12% of its body weight each day. Write an equation that represents the amount y (in pounds) of food a manatee eats each day for its weight x. Identify the independent and dependent variables.