What is the value of - 9r - 7 when r = 2?

-25

-18

11

45

What's is the noble gas notation for Selenium

A digital watch cost$11.75, what is the tax rate at $3.75%

John had $900 Jacob has $900 Alex had $200 Who had the most money

27m^3+64n^3 Answer sheet says it is (3m+4n) (9m^2-12mn+16n^2) can someone tell me where they got the "-12mn" from?

Asha and Jamal are selling plants to raise money for their soccer team. They started out with 45 plants. They sold some plants and now they have 21 plants left. Asha wrote the equation 45 - p = 21 to find the number of plants they sold.

What is 4.12 expressed as the quotient of two integers in simplest form?

Use the system of equations to answer the questions. 2x + 3y = 3 y = 8 - 3x The value of y from the second equation is substituted back into the first equation.

A piggy bank contains $4.45 is dimes and quarters. If the bank contains 25 coins, how many dimes are in the bank? 12 13 15

Round off 24.67 to one significant

Solve by substitution or elimination 2x + y = 5 2x - y = 3