Question
- 9
- 5
- 4
- 1
Hint:
Hint:
We are given an equation in one variable and we need to find the value of an expression containing that variable. First, we find the value of from the given equation and then input the value in x - 4
To find the value of , we simplify the equation 
. To simplify, we add, subtract, multiply and divide by the same number on both sides.
The correct answer is: 1
The given equation is
First, we solve for , that is, we find the value of x which satisfies the above equation.
Adding 2 on both sides, we get,
Simplifying, we have,
Subtracting from both sides, we have
This gives us
5 = x
The above equation can be rewritten as
x = 5
Using this value of to find the value of x - 4 , we have
Thus, the correct option is D).
Note:
Instead of adding 2 on both sides, we can also understand the concept by taking -2 of the right hand side on the left hand side and then the sign changes to + 2 . Similarly, instead of subtracting both sides by , we can understand it by saying that we take + x from the left hand side to the right hand side, and here it becomes - x .
Thus, addition becomes subtraction and vice-versa when taken from left hand side to right hand side or the opposite way; and multiplication becomes division and vice-versa. Be careful, 0 is never taken in the denominator.
Related Questions to study
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Note:
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Note:
Another way of solving this problem is to expand all the terms in the expression
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△ DEF ≅ △ LMN
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Which of the following statements is NOT true?
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Note:
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Infact, there is further categorisation of simple random sampling- probability and non-probability sampling.
One hundred park-district members will be selected to participate in a survey about selecting a new park-district coordinator. Which of the following methods of choosing the 100 members would result in a random sample of members of the park district?
Note:
The method given is option A is called simple random sampling. Some other methods of random sampling are stratified random sampling, cluster random sampling and systematic random sampling.
Infact, there is further categorisation of simple random sampling- probability and non-probability sampling.
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Identify all pairs of congruent corresponding parts. Then write another congruence statement for the
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Two polygons are considered to be congruent if the sides and angles match. When two sides or angles have the same length are considered to be congruent. We demonstrate that the angles are congruent by inserting the same slash marks through each one.
The symbol for congruence is ≅ and can be written as △ABC ≅ △DEF. ∠A is equivalent to ∠D, ∠B to ∠E, and ∠C to ∠F. Side AB corresponds to DE, BC to EF, and AC to DF.
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A physician prescribes a treatment in which a patient takes 2 teaspoons of a medication every 6 hours for 5 days. According to the prescription, how many teaspoons of the medication should the patient take in a 24-hour period?
Note:
It may confuse some students but the fact that the medication needs to be taken for 5 days is not necessary to solve this question.
A physician prescribes a treatment in which a patient takes 2 teaspoons of a medication every 6 hours for 5 days. According to the prescription, how many teaspoons of the medication should the patient take in a 24-hour period?
Note:
It may confuse some students but the fact that the medication needs to be taken for 5 days is not necessary to solve this question.
