Mathematics
OpenStudy (anonymous):

Identify the variables, constants, and coefficients in the simplified expression. 5xy - 3yz - 5xz + yz - 4xz + 7xy First combine all like terms: (5xy+7xy)+(yz-3yz)-(5xz+4xz) 12xy-2yz-9xz Now replace the x,y & z terms with their numeric values: and evaluate it for x = 10, y = -4, z = -6. 12(10*-4)-2(-4*-6)-9(10*-6) 12*-40-2*24-9*-60 -480-48+540=12 ans.

OpenStudy (mertsj):

You got it right. Good for you!!

OpenStudy (anonymous):

i just dont know how to identify

OpenStudy (mertsj):

the variables are x y and z The coefficients are 12, -2, and -9 There are no constants

OpenStudy (anonymous):

6z + 1 + 4x^2 - 3y3 + 7x - 8y2 + 2x2 - x + 5z - 17 first you need to combine all like terms: (6z+5z)+(4x^2+2x^2)-3y3-8y^2+(7x-x)+(1-17) 11z+6x^2-3y^3-8y^2+6x-16 now replace x with -2, y with -3, z with -5. 11*-5+6*(-2)^2-3*(-3)^3-8*(-3)^2+6*(-2)-16 -55+6*4-3*-27-8*9-12-16 -55+24+81-72-12-16 -50 ans.

OpenStudy (anonymous):

is this right? and how do you even Identify the variables, constants, and coefficients in the simplified expression.

OpenStudy (mertsj):

What is the simplified expression?

OpenStudy (anonymous):

the first

OpenStudy (mertsj):

The simplified expression is the one you get after you combine the like terms.

OpenStudy (anonymous):

i got that but in the one i just posted^^ whats the coff and constant?/

OpenStudy (mertsj):

In your case it is 11z+6x^2-3y^3+6x-16

OpenStudy (mertsj):

The coefficients are 11, 6, -3, 6 and =16 The variables are x, y, and z The constants are -16

OpenStudy (mertsj):

I made a typo in the coefficients. they are 11, 6, and -3

OpenStudy (anonymous):

okay thank you mertsj

OpenStudy (mertsj):

yw