Question 1 Report
The table above shows that the scores of a group of students in a test. If the average score is 3.5, find the value of x
Answer Details
mean=60+5x18+x3.5=60+5x18+x72=60+5x18+x m e a n = 60 + 5 x 18 + x 3.5 = 60 + 5 x 18 + x 7 2 = 60 + 5 x 18 + x 7(18+x) = 2(60+5x) 126 + 7x = 120 + 10x 10x - 7x = 126 - 120 3x = 6 x = 2
Evaluate (8134−2713)3×23
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Simplify 31/2 - (21/3 * 11/4) + 3/5
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