Answer:
1. 5
2. 6
3. 12
4. 2
Explanation:
You need to plug in the values of the variables into the expression.
1. xy - 5 when x = 5 and y = 2
(5)(2) - 5
5 × 2 - 5
10 - 5
5
2. r + s² when r = 5 and s = 1
(5) + (1)²
5 + 1
6
3.
when c = 6 and d = 3


12
4. m - 3n when m = 8 and n = 2
(8) - 3(2)
8 - 6
2