Answer:

Step-by-step explanation:
Start by making the denominators of both fraction the same. This can be done by multiplying one fraction's denominator by the other.
After simplifying and combining the two fractions together, check if the numerator can be factorised such that there is a common factor in the denominator and numerator. In this case, the numerator cannot be factorised.
Lastly, expand the denominator.






The square root is

Just square the top and bottom of the fraction.

and

so we have 12/16 and then we reduce to 3/4
Answer:
approximation is often useful when it is not a very good one
C. You can graph it on Desmos and all the given points work.
You multiply 86 by 42.5 because each board is 42.5 and there are 86 boards.