3 ( s + 4) = 30 what dose s equal
1 answer:
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Simple interest formula:
where
=interest, 
=principal (how much you put in at first), 
=rate as a decimal, and 
=number of years.
Let's plug in what we're given.
Calculate it out...
The interest earned is $70.00.
where
Let's plug in what we're given.
Calculate it out...
The interest earned is $70.00.
Answer:
27 by 27
Step-by-step explanation:
Let the sides be x and y. The problem is essentially asking:
Given 2(x+y)=108, maximize xy.
We know that x+y=54. By the Arithmetic Mean - Geometric Mean inequality, we can see that . Substituting in x+y=54, we get
, meaning that
. Equality will only be obtained when x=y (in this case it will generate the maximum for xy), so setting x = y, we can see that x = y = 27. Hence, 27 is the answer you are looking for.