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secondary 2 | Maths
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Date Posted: 7 years ago
Views: 627
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5) Sub 5.5 into the eqn and you will find that it does not equals to 20. Hence it is not a solution.
6) let the number be x and consecutive number b x+1:
x + (x+1) = 31
2x + 1 = 31
2x = 30
x = 15.
Therefore the 2 numbers are 15 and 16
6) let the number be x and consecutive number b x+1:
x + (x+1) = 31
2x + 1 = 31
2x = 30
x = 15.
Therefore the 2 numbers are 15 and 16
Date Posted:
7 years ago
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Q5. To check if x=5.5 is a solution of 5x+12=20, you just have to substitute x=5.5 into the equation and check if the end answer is correct.
Q6. As the two numbers are consecutive, the difference of the two numbers is 1. By dividing 30 (from 31-1) by 2, you get the first number of the 2 numbers.
Q6. As the two numbers are consecutive, the difference of the two numbers is 1. By dividing 30 (from 31-1) by 2, you get the first number of the 2 numbers.
Date Posted:
7 years ago
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