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Evaluate the expression for x = 5, y = 3, and z = 14 . 5x−6y+20z over 4yz Enter your answer in th...
9 months ago
Q:
Evaluate the expression for x = 5, y = 3, and z = 14 . 5x−6y+20z over 4yz Enter your answer in the box.
Accepted Solution
A:
Hello from MrBillDoesMath!
Answer: 1 17/24
Steps: Evaluate (5x-6y+20x)/ 4yz when x = 5, y = 3, z = 14
(5(5) - 6(3) + 20(14)) / 4 (3)(14) (Substitute in values) = (25 - 18 +280) / 4 (3) (14) (Evaluate products) = (287) / 4 (3) (14) (Evaluate expressions) = 287/ 168 (4 (3)(14) = 168) = (168 + 119 ) /168 287 = 168 + 119 = (168)/168 + 119/168 = 1 + 119/168 = 1 119/168 BUT 119 = 17 * 7 (surprise!) and 168 = 12 * 7 * 2 so answer = 1 (17*7)/(12*7*2) = 1 (17)/(12*2) (Cancel 7's) = 1 (17/24)
Regards, MrB