Evaluate each of the following expressions. Use the given value of each variable.
Algebraic Expression Assigned value/s of the variable/s
1. 7a + 3b a = -4 b = 2
2. 4xy - 2(x + y) – y2 x = 3 y = 4
3. (3y + y) + y2 y = -5
4. 3(m – n) + (6m ÷ n) m = 6 n = -4
5. (4x2 ÷ y) + 3(x - y) x = -3 y = 6