Evaluate the following algebraic expressions.
1. x + 3(x − 5) when x = 25
2. 3wxy + 4xy2 − 8w3y when w = 4, x = −1 and y = 2
1. x + 3(x − 5) when x = 25
2. 3wxy + 4xy2 − 8w3y when w = 4, x = −1 and y = 2
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Answer:
1. x + 3(x − 5) when x = 25
25+3(25-5)
25+3(20)
28(20)
560
2. 3wxy + 4xy2 − 8w3y when w = 4, x = −1 and y = 2
3(4)(-1)(2)+4(-1)(2)^2-8(4)^3(2)
12(-2)-4(4)-8(64)(2)
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