Answer:
A
Step-by-step explanation:
we can use pythagorean identieis
remember that 
also remember that
and 
so if we take
and divide both sides by
we get



subtracting
from both sides

now subsitute into original problem



the answer is -1
The mean is found by dividing the sum of all terms by the number of terms present in the set.
Set up the equation:

The mean of this sequence is
5.
Answer:
n= 5.57 years
Step-by-step explanation:
Giving the following information:
your final balance on an investment of 270$ invested at 10% was $459.00
<u>To calculate the time passed between values, we need to use the following formula:</u>
n= ln(FV/PV) / ln(1+i)
FV= 459
PV= 270
i= 0.1
n= ln(459/270) / ln (1.1)
n= 5.57 years
If two sides of one triangle are congruent to two sides of another triangle then CPCTC makes it SSS