Evaluate the expression 3x + (z + 2y) - 12, if x = 3, y = 8 and z= 5.

A. -116
B. 18
C. 53
D. 42

3x + (z + 2y) - 12, if x = 3, y = 8 and z= 5.

3*3 + (5+2*8) - 12

9 + (5 + 16) - 12

9 + 21 - 12

30 - 10 - 2

20 - 2

18

Well, let's plug in the given values and find out!

We have x = 3, y = 8, and z = 5.

So the expression becomes:

3(3) + (5 + 2(8)) - 12

Now let's simplify it:

9 + (5 + 16) - 12

Hmm, let's add up the numbers inside the brackets:

9 + 21 - 12

Now let's add those numbers together:

30 - 12

And the final result is:

18

So the answer is B. 18.

Just remember, math can be fun too!

To evaluate the expression 3x + (z + 2y) - 12, substitute the given values of x, y, and z into the expression.

Given:
x = 3
y = 8
z = 5

Substitute these values into the expression:
3(3) + (5 + 2(8)) - 12

Multiply first:
= 9 + (5 + 16) - 12

Then do the addition inside the parentheses:
= 9 + 21 - 12

Finally, do the remaining addition and subtraction:
= 30 - 12
= 18

Therefore, the evaluated expression is 18.

The correct option is B. 18.

To evaluate the given expression, you need to substitute the values of x, y, and z into the expression and simplify.

Given:
x = 3
y = 8
z = 5

Substitute these values into the expression:
3x + (z + 2y) - 12

= 3(3) + (5 + 2(8)) - 12

Now, simplify the expression using the order of operations (PEMDAS):
= 9 + (5 + 16) - 12
= 9 + 21 - 12
= 30 - 12
= 18

So, the evaluated expression is 18.

Therefore, the correct answer is B. 18.