Question

Evaluate the following expression using the values given:

Find 2x - 3y − z, If x = -2, y = 3, and z = -2

(A) -11
(B) 11
(C) -15
(D) 15

Answer 1

2x - 3y - z ; Where x = -2, y = 3, and z = -2

Since we're given the values of x, y, & z, we can very simply plug everything in, i.e.,: 

2·(-2) - 3·(3) - (-2)

Simplify.

(-4) + (-9) + 2

Get rid of parenthesis.

-4 - 9 + 2

Remember to do PEMDAS.

• Parenthesis
• Exponents
• Multuply
• Divide
• Add
• Subtract

So, since adding comes before subtracting, let's add! 

-4 - 9 + 2

-4 - 7

Simplify.

-11

So, the answer is (A) -11