Xis all of the following except

Mathematics

2 answers:

bixtya [17]3 years ago

5 0

Answer:

a variable

Step-by-step explanation:

a variable.

11Alexandr11 [23.1K]3 years ago

5 0

X is not an expression unless it has signs. so x by itself would not be an expression without different numbers and sign between

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A and b together can do a piece of work in 8 days. If a alone can do the same work in 12 days, then b alone can do the same work

Nostrana [21]

B can finish the job alone in 24 days.

In work-rate problems, a certain person can complete a fraction of the job for a specific timeframe. As stated in the problem, A and B can finish the job by working together for 8 days. It must be noted that the fraction of the job they can finish individually per day is additive.

$\frac{1}{A} + \frac{1}{B} = \frac{1}{8}$

A can complete the work in 12 days and finish 1/12 fraction of a job per day. This can be substituted directly to the equation to solve for the time B needed to finish the work.

$\frac{1}{12} + \frac{1}{B} = \frac{1}{8}$