SOLUTION: I am supposed make sure that I simplify the expression before I identify the variables, coefficients, and constant terms. 1.Simplify the algebraic expression 3x^2 – 2y + 7x^2 –

Algebra ->  Equations -> SOLUTION: I am supposed make sure that I simplify the expression before I identify the variables, coefficients, and constant terms. 1.Simplify the algebraic expression 3x^2 – 2y + 7x^2 –       Log On


   

Question 190246: I am supposed make sure that I simplify the expression before I identify the variables, coefficients, and constant terms.
1.Simplify the algebraic expression 3x^2 – 2y + 7x^2 – 5y + 3 and evaluate it at x = 2 and y = 14. Identify the variables, coefficients, and constant terms in the simplified expression. Please help I am sooo lost. Thanks
Answer by sabrinawayjack(8) About Me  (Show Source):
You can put this solution on YOUR website!
3x%5E2-2y%2B7x%5E2-5y%2B3
First Step: Combine like terms.

3x%5E2%2B7x%5E2=10x%5E2
-5y%2B2y=-3y

Second Step: Fit your like terms into the regular equation.

10x%5E2-3y%2B3.
Now you subsitute for the variables.

10%282%29%5E2-3%2814%29%2B3
20%5E2-42%2B3
400-42%2B3=+361

Variables-x,y
Coefficents-10,3
Constant terms-3