B. Evaluate the following algebraic expressions for the given value of the variable,
1. If n = 6, then the value of 9 + n is
2. If y = -5, then the value of y2 + 3 is
3. If a = 3, b = 10, then ab - 3 is
4. If x= -7, then 2x2 -- 50 is
5. If x=-1, y = 5, then 2x - is?
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