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
Marina CMI [18]
3 years ago
9

PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!

Mathematics
2 answers:
Vinvika [58]3 years ago
6 0

Hello there,

What is the sum of the first 7 terms of the series −8 +16 −32 + 64−... ?

Answer: -258



ch4aika [34]3 years ago
3 0

Answer: -258

<u>Step-by-step explanation:</u>

Given the sequence {-8, 16, -32, 64, ... , a₇} we know the following

  • the first term (a₁) = -8
  • the common ratio (r) = -2
  • the number of terms (n) = 7

Input the information above into the Sum formula:

S_n=\dfrac{a_1(1-r^n)}{1-r}\\\\S_7=\dfrac{-8(1-(-2)^7)}{1-(-2)}\\\\.\quad =\dfrac{-8(1-(-128))}{1+3}\\\\.\quad =\dfrac{-8(129)}{4}\\\\.\quad =-2(129)\\\\.\quad =-258

You might be interested in
Simplify.<br> 7x + 3(x - 2) - 4x + 8
alisha [4.7K]

Answer:

6x+2

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
involving a carnival fishpond. Assume that the pond contains 100 fish: 78 purple, 21 blue, and 1 silver. A contestant pays $0.65
saw5 [17]

Answer:

On average the carnival gain on each play

= 0.04 dollars

Step-by-step explanation:

Given that a pond contains 100 fish: 78 purple, 21 blue, and 1 silver.

Fish            Purple     Blue          Silver    total

   

Frequency  78               21                 1    100

Prob          0.78      0.21             0.01      1

Revenue           0.4                0.8            13  

game fee 0.65        0.65            0.65  

Net revenue -0.25      0.15            12.35    

   

Net Rev*Prob -0.195      0.0315   0.1235   -0.04

Thus we get per player expected net revenue is -0.04

This would be gain for Carnival

Hence On average the carnival gain on each play

= 0.04 dollars

3 0
3 years ago
What is -9.98 as a fraction?
Rzqust [24]

Answer: -449/50

Step-by-step explanation:

-9.98

1) Put in fraction form.

-998/100

2) Simplify.

-449/50

5 0
3 years ago
Read 2 more answers
What is the means-to-MAD ratio of the two data sets, expressed as a decimal? Data set Mean Mean absolute deviation (MAD) 1 10.3
aleksklad [387]
Mean -to-MAD ratio is the division of the Mean by the Mean Absolute Deviaion (MAD). For the set 1, mean / MAD is 10.3 / 1. 6 = 6.4375; and for the set 2, Mean / MAD is: 12.7 / 1.5 = 8.467. This is a measure of disperssion of a set of values. MAD is calculated as the sum of the absolute differences of the values and the mean.
4 0
3 years ago
Simplify expression show step by step <br> (-2i)(8i)
TiliK225 [7]

Answer:

16

Step-by-step explanation:

<u>Remember that i^2 = -1 </u>

(-2i)(8i)

-16i^2

-16(-1)

16

5 0
3 years ago
Other questions:
  • If Log 4 (x) = 12, then log 2 (x / 4) is equal to <br><br> A. 11 <br> B. 48 <br> C. -12 <br> D. 22
    5·2 answers
  • The mean of 2,4,6,8,10
    9·2 answers
  • What property is illustrated in the equation? 7 + 1/2 = 1/2 + 7
    5·1 answer
  • Rearrange 3y + 2x = 14<br>Clearly with explanation
    6·2 answers
  • What are the values for the coefficients and constant term of 0 = 2 + 3x2 – 5x?
    11·1 answer
  • A class of 20 students is visiting the fair today. Each student is 16 years old or younger and will participate in
    9·2 answers
  • 500 people fill up 4/9 of the hall. What is the seating capacity of the hall?
    11·2 answers
  • I need the answer with steps please​
    13·1 answer
  • Heyy whats 300+7000???
    14·2 answers
  • Did I do this right??
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!