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
Varvara68 [4.7K]
3 years ago
9

Please help

Mathematics
2 answers:
lubasha [3.4K]3 years ago
8 0

Let us check series : -10 /-2 = 5 -50/-10 = 5

so it is a geometric series with a= -2 and r= 5

sum formula for n terms of geometric series = a ( r^n -1 ) /( r-1)

here we find S5 that is n= 5 = -2 ( 5^ 5 - 1) /( 5-1)

= -2 ( 3125 -1) / 4 = -1562

second series is : 1.5/1 = 1.5 2.25/1.5 = 1.5

this is also geometric series but n = 12 a= 1 and r= 1.5

we use same formula

S12 = 1 ( (1.5) ^12 -1) /( 1.5-1) =

128.74 / 0.5 = 257.49

Last is 2/1= 2 4/2 = 2 8/4 = 2 so r = 2 a = 1 and n = 12

we use same formula 1 ( 2^12 - 1) / (2-1)

= 4095

Answers : -1562 , 257.49 , 4095

shepuryov [24]3 years ago
7 0

-10 /-2 = 5 -50/-10 = 5, it is a geometric series with a= -2 and, r= 5. sum formula for n terms of geometric series is = a ( r^n -1 ) /( r-1)

here S5 that is n= 5 = -2 ( 5^ 5 - 1) /( 5-1) = -2 ( 3125 -1) / 4 = -1562

2nd series is : 1.5/1 = 1.5 2.25/1.5 = 1.5

this is also geometric series but n = 12 a= 1 and r= 1.5

we use same formula

S12 = 1 ( (1.5) ^12 -1) /( 1.5-1) =

128.74 / 0.5 = 257.49

Last is 2/1= 2 4/2 = 2 8/4 = 2 so r = 2 a = 1 and n = 12

we use same formula 1 ( 2^12 - 1) / (2-1)

= 4095

Answers : -1562 , 257.49 , 4095

You might be interested in
There are 50 pennies in a roll. If you have 150 rolls of pennies, how many pennies do you have?
Y_Kistochka [10]

Answer: 7500

Step-by-step explanation:

multiply 150 by 50

8 0
2 years ago
P+12=17 what does p equal in this situation ​
victus00 [196]

Answer:

5

Step-by-step explanation:

5+12= 17

8 0
3 years ago
Read 2 more answers
A 25 ft. ladder resting against the side of a building forms a right triangle with the ground. The bottom of the ladder is 7 ft.
ruslelena [56]

Answer:

The correct answer is 24

Step-by-step explanation:

to solve this you will need to use the pathagreom theorum

a^{2}+b^{2}=c^{2}

A= one side lenth

B= the secons side lenth

C= hypotnuse

It is helpfull to draw out the situation

you know that the latter is 25 ft, that is your hypotnuse

you also know that the 7 ft away from the base of the building is one of the side lenths, lets call it side a

so plug the numbers into the equation

7^2 + b^2 = 25 ^2

you leave b^2 alone because that is the side you are trying to find

now square 7 and 25 but leave b^2 alone

49 + b^2 = 625

now subtract 49 from both sides

b^2 = 576

now to get rid of the square of b you have to do the opposite and square root both sides removing the square of the B and giving you the answer of..........

B= 24

Hope this helped!! I tryed to explain it as simpil as possiable

6 0
2 years ago
Read 2 more answers
For which of the following graphs would it NOT make sense to connect
marshall27 [118]

Answer:

B

Step-by-step explanation:

the rest of the answers are the same and it is harder to compare if the lines are connected because you are most likely going to use a bar graph

6 0
3 years ago
If the foci of an ellipse are the same ordered pair, is the comic a circle?
Firdavs [7]

Answer:

yes

Step-by-step explanation:

4 0
3 years ago
Other questions:
  • Please help math question WILL MARK AS BRAINLIEST IF CAN PLEASE HELP!!
    13·1 answer
  • Find the circumference of the circle given.
    5·1 answer
  • What is the diameter of a circle with a circumference of 37.68 inches? Use 3.14 for pi.
    7·1 answer
  • Can anyone solve this
    6·2 answers
  • I need help pls I’m really dumb
    13·1 answer
  • I need to know the slope intercept form for this question
    10·1 answer
  • Let f(x) = x^3 + 2x^2 + 3x + 1 and g(x)= 4x-5 Find f(x) x g(x)
    8·1 answer
  • I need answers asap! | Some blocks are stacked as shown. The face of each block is a square and each block represents one cubic
    9·1 answer
  • A population of insects increases at a rate of 1. 5% per day. About how long will it take the population to double? 2. 5 days 5.
    11·1 answer
  • Solve the equation<br> (6x18) (3x + 2) = 0
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!