Answer: 7
Explanation:
Replace the variable x with 4 in the expression.
2 x 2 + y - z
Replace the variable y with 2.
2 x 2 + 2 - z
Then, replace the variable z with -1.
2 x 2 + 2 - (-1)
Remove parentheses.
2 x 2 + 2 - (-1)
Simply each term.
Then, multiply 2 by 2
4 + 2 - (-1)
Multiply -1 by -1
4 + 2 + 1
Simplify by adding the numbers
( add 4 and 2)
6 + 1
Finally, add the 6 and the one
= 7
