21.
So to solve for the value of a variable in an equation, you would need to isolate x on one side. The first thing you have to do is multiply 2 and (x + 7) together, which can be rewritten as 2(x) + 2(7). After multiplying, your equation would be: 
, or A.
22.
So the rule with multiplying exponents with the same base is to add the exponents together, and the rule with dividing exponents with the same base is to subtract the exponents. Your equation will be simplified as such:
Now the rule with converting negative exponents into fractions is 
. In this case, 4^-2 would turn into 
, or C, which is your final answer.
Outsourcing is well known as just an exercise which takes occurs when a company, therefore the answer is "Option b" that is "Outsourcing", and the further discussion can be defined as follows:
- It gives another business a task to perform or to undertake for them rather than themselves.
- It is an agreement between the two companies, usually for a specified period.
- It is made to be better efficient and to minimize the costs.
- In the large marketing company agreements for worker cheques with such a payroll service provider, they outsource people.
Therefore, the final answer is "Option b".
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171/500....... is the answer
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