By keenly investigating the given above, it is observed that the given is a geometric sequence with first term (a1) equals 1 and common ratio (r) is 1.5. The geometric series can be calculated by the equation,
Sn = a1 x (1 - r^n) / (1 - r)
where n is 15.
Substituting the known values,
<span>Sn = 1 x (1 - 1.5^15) / (1 - 1.5) = 873.78778
</span>
Therefore, S15 is approximately equal to 873.79.
Ok this is figured out by setting up the system 2260= 230x (adult) + 180y (student), x= y+ 2.25. If you need help solving the system, comment and I will help you.
Answer:
-9x-4x=-13x
Step-by-step explanation:
They both already have the same variable, so you would solve it like any other subtraction problem and put the x at the end.
The other tree is 30 feet because both shadow and tree height goes down by ten
