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
SVETLANKA909090 [29]
2 years ago
15

Use the formula to evaluate the series 3-9+27-81+...-a8

Mathematics
1 answer:
Andrej [43]2 years ago
6 0

In the given series, we see that the first term is 3 and the common ratio between the succeeding terms is -3. To solve for the sum of the first 8 terms, we use the equation,

                                    Sum = (a1)(1 – r^n) / (1 – r)

Substituting the known terms,

                                    Sum = (3)(1 – (-3)^8)/(1 - -3) = -4920

<span>Thus, the answer is -4920.</span>

You might be interested in
Solve each equation x-6=8
jok3333 [9.3K]
Equation is
x-6=8
x=8+6
x=14
X equal to 14
8 0
3 years ago
Find the leading coefficient and write the factored form of the function of least degree for the polynomial in the graph below.
OLga [1]
Yyyiyoyjtjdnxhwhshshdhesjdjejd
3 0
2 years ago
If 5 miles is 8km . Convert 33.7 km into miles
LenKa [72]

Answer:

20.94021

Step-by-step explanation:

mark me brainlist

7 0
2 years ago
Read 2 more answers
Select the angle that correctly completes the law of cosines for this triangle. 72 + 252 – 2(7)(25)cos ___ = 242 A. 180° B. 90°
meriva

Answer:

x =76.45 degrees

Step-by-step explanation:

72 + 252 – 2(7)(25)cos _x__=242

combine like terms

324-350cosx = 242

subtract 324 from each side

-350x = -82

divide by -350

cos x = -82/-350

cos x = 82/350

take the arccos of each side

arccos (cos x) = arccos (82/350)

x =76.45 degrees


7 0
3 years ago
I NEED HELLP PLZZZZZZZZZZZ
SVEN [57.7K]
20.41
(one pound is .454 kilograms)
6 0
2 years ago
Read 2 more answers
Other questions:
  • What is 0.156 divided by 1.2 please explain
    7·2 answers
  • Let h be the function that assigns each student ID number to a grade level.
    8·1 answer
  • The lines 6y+2=12x+4 and 4y+12=2x-8 are: a) parallel.
    10·1 answer
  • Maureen budgets $1420 each month for fixed expenses. what percent of her net monthly income is that if she nets $2200 semimonthl
    11·1 answer
  • *
    15·1 answer
  • The heights of american men aged 18 to 24 are approximately normally distributed with a mean of 68 inches and standard deviation
    14·2 answers
  • Is the set of ordered pairs above a function? {(3,4), (1,5), (-9,0), (3,-2)}
    10·1 answer
  • Does anyone know how he got from step 1 to step 2??????????
    6·1 answer
  • 7. These values represent the expected number of paintings a person will produce over the next 10 days. 0, 0, 0, 1, 1, 1, 2, 2,
    6·1 answer
  • Hey&lt;3 If you help you’re amazing if you don’t you’re awesome.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!