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-3<x<3
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17 Dec 2021, 10:52
17 Dec 2021, 10:52
1
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100% (00:56) correct
0% (00:00) wrong based on 12 sessions
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\(-3<x<3\)
I tried to solve it as follows
1- multiply 10 for both sides
2- subtract 6x from both sides
We will have:
Then I concluded that if I substitute 0, A is greater. If I substitute 2 B will be greater.
The answer is D.
Now my question here :
Can we use choosing number strategy after using the + & - strategy? we can't mix them?
Quantity A |
Quantity B |
\(\frac{6x+5}{10}\) |
x |
I tried to solve it as follows
1- multiply 10 for both sides
2- subtract 6x from both sides
We will have:
Quantity A |
Quantity B |
5 |
4x |
Then I concluded that if I substitute 0, A is greater. If I substitute 2 B will be greater.
The answer is D.
Now my question here :
Can we use choosing number strategy after using the + & - strategy? we can't mix them?
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Re: -3<x<3
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17 Dec 2021, 11:09
17 Dec 2021, 11:09
1
Asmakan wrote:
\(-3<x<3\)
Quantity A |
Quantity B |
\(\frac{6x+5}{10}\) |
x |
We can solve this question using matching operations
Given:
Quantity A: \(\frac{6x+5}{10}\)
Quantity B: \(x\)
Multiply both quantities by \(10\)\(\) to get:
Quantity A: \(6x+5\)
Quantity B: \(10x\)
Subtract \(6x\) from both quantities to get:
Quantity A: \(5\)
Quantity B: \(4x\)
Divide both quantities by \(4\) to get:
Quantity A: \(1.25\)
Quantity B: \(x\)
If x = 0, then Quantity A is greater
If x = 2, then Quantity B is greater
If x = 1.25, then the quantities are equal.
Answer: D
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-3<x<3
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17 Dec 2021, 10:58
17 Dec 2021, 10:58
1
Expert Reply
Sir
there is no necessity even to calculate anything
x can be an integer positive or negative. However, could be also a fraction.
This is already enough to be sure that the answer MUST be D
Specifically to reply to your question the answer is yes. I would say you should take into account
positive numbers
negative
integers
fractions
there is no necessity even to calculate anything
x can be an integer positive or negative. However, could be also a fraction.
This is already enough to be sure that the answer MUST be D
Specifically to reply to your question the answer is yes. I would say you should take into account
positive numbers
negative
integers
fractions
