Math Classwork. If you could help it would be much appreciated :)

Mathematics

1 answer:

maria [59]3 years ago

8 0

Answer:

these are quadratic graphs

Step-by-step explanation:

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Simplify the expression below. 1/2 • 6+ 9 - (18÷6)

Anna007 [38]

First, solve within the parentheses. 18/6=3. Now solve the multiplication and division 1/2x6=3. The equation is now 3+9-3. Add and/or subtract from left to right. 3+9=12. 12-3=9. The answer is 9.

6 0

3 years ago

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.

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