Which of these num. are prime:

1, 11, 21, 51?

The combined land area of the countries A and B is 178,973 square kilometers. Country A is larger by 573 square kilometers. Determine the land area of each country.

Tameka bought 50 cans of soda (cola, grape, and orange) to serve at a party. She has 8 more colas than grape sodas, and 3 less orange sodas than grape sodas. How many of each type of soda did Tameka buy?

What is the answer sir

Write an equation of the line that passes through (0,5) and (-1.5,1)

X = [-b±√ (b²-4ac) ] / 2a. find the solve if you don't know test yourself

The adult hummingbird weights 0.056 ounces. This is three times lighter than the worlds largest butterfly. How much does the butterfly weigh? Express your answer in scientific notation

It takes 36 minutes for 7 people to paint 4walls. How many minutes does it take 9 people to paint 7 walls?

The sales of digital cameras (in millions of units) in year t is given by the function f (t) = 3.06t + 6.84 (0 ≤ t ≤ 3) where t = 0 corresponds to the end of 2001.

Express your answers as reduced, improper fractions, if necessary. Solve 4x^2 + 57 = 226 using square roots.

Larry had $480 he used 2/3 of it to buy an electric band he also bought tea set for 60 how much money did he have left