Find the cos of 225 degrees

Is (1, 6) a solution to this system of equations? x + 5y = 14 2x + 3y = 20

The Census Bureau says that the 10 most common names in the United States are (in order) Smith, Johnson, Williams, Jones, Brown, Jones, Miller, Davis, Garcia, Rodriguez, Wilson. These names account for 9.6% of all U. S. residents.

4. A council of three people is to be chosen from a group of 4 lawyers, one artist, and 3 teachers. What is the probability to have at least one teacher in the council?

What is the square root of 750?

Multiply. (3.5 x 10^-5) (3 x 10-10)

Which value or values for the variable c from the set below will make 5.6 + 0.4c 6c true? a. only 2.5 b. 1 and 2.5 c. 0.875, 1, and 2.5 d. all of the values in the set

What is the correct value of f (-10) if f (x) = 6x2 - 5x

Is 14 a prime or composite number

Factor completely x^4+5x^3+4x+20

I am not good with math. Jessica lost some money she found 3/6 of it what fraction of her money is still missing