Which expression represents the sum of 21 and an unknown number?

A. 21-d

B. 21+d

C. 21:d

D. 21d

What is y-8=3 (x+1) written in standard form?

Combine like terms and note the degree 8a^6bc-abc-8a^6bc

What is the solution of the equation 3x+7=1?

Write an algebraic expression for the following phrase 3 more than twice a number

13.1233596 to the nearest hundred

How do you write 120% as a decimal and as a fraction

Find the derivative of the function. y = √ (11x + √ (11x + (√11x)))

Carmen spent $88 at the mall the money she spent was 25% of the total amount she had in her wallet

Which of the following situations can be modeled with a periodic function? A) the height of a football after it has been thrown B) the height of a person riding on an escalator C) the height of a building after it has been constructed D) the height

Solve 1/3 x = - 4/5?