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
Oksi-84 [34.3K]
3 years ago
5

What is the sum of the n terms of the series 5 10 20 40 . . . ?

Mathematics
1 answer:
Lubov Fominskaja [6]3 years ago
5 0
Hello,

5+10+20+40+...\\
=5(1+2+2^2+2^3+...+2^{n-1})\\

=5*\frac{5^n-1}{4}

You might be interested in
15 is what percent of 500
TEA [102]
% of 15 in 500= (15÷500)×100
= 0.03×100
= 3 %
5 0
4 years ago
Please help. I don’t understand this math problem.
Jobisdone [24]

Answer:

(7) The value of -j is 9.

(8) The value of -(-j) is -9.

(9) The value of (-j)(-j) is 81.

Step-by-step explanation :

<u>Part 7:</u>

Given algebraic expression is:

j = -9

Now we have to determine the value of (-j).

-j = - (-9) = 9

The value of -j is 9.

<u>Part 8:</u>

Given algebraic expression is:

j = -9

Now we have to determine the value of -(-j).

- (-j) = - [-(-9)] = -9

The value of -(-j) is -9.

<u>Part 9:</u>

Given algebraic expression is:

j = -9

Now we have to determine the value of (-j)(-j).

(-j)(-j) = [- (-9)] ×  [- (-9)] = 9 × 9 = 81

The value of (-j)(-j) is 81.

7 0
3 years ago
The time, t, required to drive a certain distance varies inversely with the speed, r, if it takes 7 hours to drive the distance
user100 [1]
Inverse functions will be given by the following equation:

t * r = k

k is a constant value that the two variables must multiply to.

Plug in your t and r values:

7 * 55 = 385

k = 385.

Now we'll have to find a value that multiplies with 65 to equal 365.

Set up the following equation:

x * 65 = 385

This equation can also be treated as the following:

65x = 385

Divide both sides by 385 to get x by itself:

x = 5.92

The answer is C. about 5.92 hrs to drive the same distance of 385 miles.
6 0
3 years ago
It takes 25 minutes to fry a burger at Jill street, how long will it take to fry 13 burgers​
Misha Larkins [42]

Answer:

325 minutes

Step-by-step explanation:

We can use a ratio to solve

25 minutes         x  minutes

------------------  = ---------------

1 burger                   13 burgers

Using cross products

25*13 = 1x

325 = x

325 minutes

7 0
3 years ago
Read 2 more answers
Which of the following is not the same as 0.953 kilograms? 953,000mg 953g 9,530cg
balandron [24]
<span>10 mg = 1 cg 100 cg = 1 g 1000 g = 1 kg. Thus, 0.953 kg = 1000 x 0.953 = 953g 0.953 kg = 0.953 x 1000 x 100 = 95,300cg 0.953 kg = 0.953 x 1000 x 100 x 10 = 953,000 mg Therefore, from the give options, 9,530cg is not the same as 0.953 kilograms. Therefore, the correct answer to the question "Which of the following is not the same as 0.953 kilograms?"is 9,530cg</span>
4 0
3 years ago
Read 2 more answers
Other questions:
  • Calculate the missing area
    14·1 answer
  • Help please will mark braniest
    9·2 answers
  • What is the domain for the given function?
    7·2 answers
  • Find the missing lengths of the sides
    12·1 answer
  • The radius of a circular table is 2 feet. What is the area of the table? Use 3.14
    13·2 answers
  • Find the length of each arc. Use the exact answer. Reporting links
    11·1 answer
  • PLEASE HELP ASAP!!!!!
    13·1 answer
  • Please help me I’m so confused!!!!!
    5·1 answer
  • What 2-digit odd number between 50 and 100 has the sum of its digits equal to 11 and the difference of its digits equal to 1?
    5·1 answer
  • a hot tub pump circulate 4 cubic feet of water per minute, how many cubic inches of water does it circulate earch minute?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!