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
Daniel [21]
3 years ago
10

Find S25 for -7+ -2 + 3 + 8 +…

Mathematics
1 answer:
vovangra [49]3 years ago
5 0
We know S(n) = n/2 [ 2a + (n-1)d ]
Here, n = 25
a = -7
d = -2-(-7) = -2+7 = 5

Substitute their values, 
S(25) = 25/2 [2(-7) + (25-1)5 ]
S(25) = 25/2 [-14 + 120 ]
S(25) = 25/2 [106 ]
S(25) = 25 [ 53 ]
S(25) = 1325

In short, Your Answer would be 1325

Hope this helps!
You might be interested in
Two numbers have a sum of 68 and a difference of 46
monitta

Answer:

57 and 11

Step-by-step explanation:

57+11=68

57-11=46

3 0
3 years ago
Read 2 more answers
Find the 20th term in the sequence, where the first term is -2 and the common ratio is-2.
geniusboy [140]

Answer:

Step-by-step explanation:

(1)

a1=-2

r=-2

a_{20}=(-2)(-2)^{20-1}=-2(-2)^{19}=2^{20}=1048576\\(2)\\a_{1}=1000\\r=\frac{200}{1000} =\frac{1}{5} \\a_{8}=1000(\frac{1}{5} )^{8-1}=1000(.2)^7=0.0128\\(3)\\a_{1}=2\\a_{3}=50\\a_{2}=\sqrt{2*50} =10\\r=\frac{10}{2} =5

6 0
2 years ago
48 lbs. equals how many kilograms?
Dahasolnce [82]
Your answer is 21.7724<span>Kilograms</span>
4 0
3 years ago
Read 2 more answers
Help if your gonna answer plz explain it
Katyanochek1 [597]

So you wanna find the area of each surface:

For the large square surface in the top you do 12*15=180 and there are two large squares faces so you multiply 180 by 2 which equals 360 then you find the small rectangle faces: 5*15=75 and multiply by 2 Bc there are 2 faces like that so it would be 75*2=150 then for the last faces you do 12*5= 60 *2= 120 at the end I add all of the faces up, 360+150+120=630

6 0
3 years ago
Find the missing parts of the triangle. Round to the nearest tenth when necessary or to the nearest minute as appropriate.
Katena32 [7]

Answer:

  • A) A = 27.3°, B = 56.1°, C = 96.6°

Step-by-step explanation:

<u>Use the Law of Cosines:</u>

  • A = arccos [(b² + c² - a²)/(2bc)] = arccos [(13.2² + 15.8² - 7.3²)/(2*13.2*15.8)] = 27.3°
  • B = arccos [(a² + c² - b²)/(2ac)] = arccos [(7.3² + 15.8² - 13.2²)/(2*7.3*15.8)] = 56.1°
  • C = 180° - (A + B) = 180° - (27.3° + 56.1°) = 96.6°

Correct choice is A.

3 0
3 years ago
Other questions:
  • The correlation between height and weight among men age 18-74 in the U.S. is about 0.40. Say whether each conclusion below follo
    6·1 answer
  • Neil bought 5 books. The average price of 2 books is 5 dollars. The average price of the rest of the books is 4 dollars. Find th
    12·1 answer
  • Use the counting principle to determine the number of elements in the sample space. Two digits are selected without replacement
    10·1 answer
  • A cylinder shaped can is used as a sand container. The can has a height of Ip
    12·1 answer
  • Answer this question correctly and get a FREE BRAINLY AND POINTS (Difficulty: Algebra?) ...
    5·2 answers
  • TEN POINTS:
    10·1 answer
  • Guys please answer question #17 and 18 below please and thank you. Sorry about this photo has been rotated, I'm gonna try my bes
    14·1 answer
  • Find the measure of the missing angles.<br> 147°<br><br> d =<br> e =<br><br> f=
    7·2 answers
  • How to solve 22 – 3y &gt; 7
    11·1 answer
  • What is that answer to 6 (3/8) - 5 (5/8) ?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!