1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
tresset_1 [31]
3 years ago
12

How do I solve this​

Mathematics
2 answers:
Alina [70]3 years ago
8 0

\bf \qquad \qquad \textit{sum of a finite geometric sequence} \\\\ S_n=\displaystyle\sum \limits_{i=1}^{n}\ a_1\cdot r^{i-1}\implies S_n=a_1\left( \cfrac{1-r^n}{1-r} \right)\quad \begin{cases} n=n^{th}\ term\\ a_1=\textit{first term's value}\\ r=\textit{common ratio} \end{cases} \\\\[-0.35em] ~\dotfill

\bf S_{20}=\displaystyle\sum \limits_{n=1}^{\stackrel{\stackrel{n}{\downarrow }}{20}}~\stackrel{\stackrel{a_1}{\downarrow }}{3}(\stackrel{\stackrel{r}{\downarrow }}{1.5})^{n-1}\implies S_{20}=3\left(\cfrac{1-1.5^{20}}{1-1.5} \right)\implies S_{20}=3\left(\cfrac{1-\stackrel{\approx}{3325.3}}{-0.5} \right) \\\\\\ S_{20}=3\left(\cfrac{-3324.3}{-0.5} \right)\implies S_{20}=3(6648.6)\implies S_{20}=19945.8

posledela3 years ago
7 0

19945.8 to simplify, the answer is

You might be interested in
Can you help me with this
irga5000 [103]

Answer: Planet A: Mars

              Planet B: Earth

Hope this helps

3 0
3 years ago
Zelda made 5 gallons of lemonade and gave each of her friends an equal amount. Write an expression that represents how much lemo
enot [183]

Answer:

2.5

Step-by-step explanation:

!!!!!!!!!!hehbeffjjdjdjsjcjjfbdbd

8 0
3 years ago
Extra points giving away who ever get this right first gets brainlest <br> 468 weeks = ______ years
Colt1911 [192]
8yrs
8.975
hope that helps
8 0
3 years ago
The table shows ordered pairs for a polynomial function, f. What is the degree of f?
Kazeer [188]

Answer:

5th degree

Step-by-step explanation:

To solve this problem/table, you have to find the differences in the f(x) side of the table until the differences between the numbers are the same, and then you have your degree. Look at the image attached for more sense

4 0
3 years ago
PLEASE SOLVE THESE 3 EASY 6TH GRADE QUESTIONS WILL GIVE BRAINLY
Brrunno [24]

Answer:

3x5

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • Julie, the soccer team's captain, wants to borrow her parents' car to drive to the tournament. Her parents tell her that she has
    12·1 answer
  • Help me tell me the answers
    7·2 answers
  • Mai biked 7 and 1/4 miles today, and Noah biked 3 5/8 miles. How many times the length of Noah's bike ride was Mai's bike ride?
    8·1 answer
  • two cassettes and three CDs cost $175 while four cassettes and one cd cost $125. Given that one cassette costs 5x and one cd cos
    11·1 answer
  • A 3 L bottle of oil costs $36 and contains 12 cups. Dinesh puts 1 cup of oil, 10 garlic gloves and 1 cup of
    14·1 answer
  • PLS help simple math properties ASAP needing 5 and 6 that’s all :)
    10·1 answer
  • Clare has $175 in her bank account. She buys a bike for $200. What is Clare's account balance now?
    8·1 answer
  • Hello please help me with this I will give Brainlyst
    14·2 answers
  • Which equation represents the line that is perpendicular to and passes through (-6,-9)?
    15·1 answer
  • felix is a car mechanic. he can fix 2 motorcycles and 3 cars in 170 minutes. he can fix 1 motorcycle and 5 cars in 225 minutes.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!