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katen-ka-za [31]
3 years ago
5

Tell whether the value is a solution of the inequality r+4 >8;r=2

Mathematics
1 answer:
natta225 [31]3 years ago
5 0
No.
2+4 is not greater than 8.
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What is the difference between 1/2 and 1 whole?
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The difference of the square of a number and 40 is equal to 3 times that number. Find the positive solution.
Wewaii [24]

Answer: The answer is 8.

Step-by-step explanation: The first step is to convert the expression into figures. We shall call the unknown number Y. So if we are told “the square of a number,” that means Y squared, or better still, Y^2. Further we are told “the difference between the square of a number and 40” and that can be written as;

Y^2 - 40.

Next we are told that this expression is equal to 3 times that number (that is 3Y). That can now be written out as follows,

Y^2 - 40 = 3Y

If we move all expressions to one side of the equation, what we would have is,

Y^2 - 3Y -40 = 0

(Remember that when a positive value crosses to the other side of an equation it becomes negative and vice versa)

We now have a quadratic equation

Y^2 -3Y - 40 = 0

By factorizing we now have

(Y -8) (Y + 5) = 0

Therefore Y - 8 = 0 or

Y + 5 = 0

Hence, Y = 8 or Y = -5

Since we are asked to calculate the positive solution, Y = 8

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There are 15 boys and 16 girls in a class room. Write the following ratio: boys to girls
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Step-by-step explanation:

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23 people walking / 100 people is 23% and 23% of 100 is 23 people.

Step-by-step explanation:

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