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borishaifa [10]
3 years ago
13

What are the factors in the expression 4(5+x)

Mathematics
1 answer:
Daniel [21]3 years ago
8 0
The factors are the parts that are being multiplied together.

4 and (5+x) are the two that are being multiplied and also the expression you get when you factor the distributed expression.

So the factors of 4(5+x) are:

4 and (5+x)
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the apprentice can complete the job in 30 hours by working alone.

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Let Number of hours required to complete a job by apprentice alone be 'a'.

Also let the job completed be = 1

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Time required on job is equal to sum of Number of hours welder work on job and Number of hours required by apprentice to complete the job.

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each has done a fraction of the work so we will add to two fraction as number of hours of work done by Total number of hours required to do the work to complete 1 job.

so we can frame the equation as;

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By reducing the fraction we get;

\frac{1}{3}+\frac{20}{a}=1

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Now denominators are same so we will solve the numerator we get;

\frac{a+60}{3a}=1

Multiplying both side by 3a we get;

\frac{a+60}{3a}\times3a=1\times 3a\\\\a+60=3a

Combining the like terms we get;

3a-a=60\\\\2a=60

Dividing both side by 2 we get;

\frac{2a}{2}=\frac{60}{2}\\\\a=30\ hrs

Hence the apprentice can complete the job in 30 hours by working alone.

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