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
jek_recluse [69]
3 years ago
15

Find Sn for the given arithmetic series. 01 = -40, d = -7, n = 22

Mathematics
1 answer:
iren [92.7K]3 years ago
6 0

Answer:

\large \boxed{-187}

Step-by-step explanation:

The formula for the sum of n terms of an arithmetic sequence is  

aₙ = a₁ + (n-1)d

If a₁ = -40, d = -7, and n = 22

\begin{array}{rcl}S_{22} & = & -40 + (22 - 1)(-7)\\& = &-40 + 21(-7)\\& = & -40 - 147\\& = & \mathbf{-187}\\\end{array}\\ \text{The sum of the first 22 terms is $\large \boxed{\mathbf{-187}}$}

You might be interested in
At Brunswick Elementary school, 2/5 of six-grade students have at least one pet. If school has 181 sixth graders, about how many
VashaNatasha [74]

Answer: 72.4

Step-by-step explanation:

Fraction of six-grade students that have at least one pet = 2/5

Number of sixth graders at Brunswick Elementary school = 181

The number of sixth graders that own own pets will be:

= 2/5 × 181

= 72.4

6 0
3 years ago
Which of the following equations represents the line with a slope of -7/4 and a y-intercept of -11?
andreev551 [17]
Y= -7/4x - 11
My answer has to be 20 characters longkdmmwmmckkdmsnskckd
4 0
4 years ago
I need help on 11-13 please i need this done asap! Can someone help me out
Alex777 [14]
13 is 141. A octagon has 1080 degrees and if you add all the angles up you get 939 and 1080-930=141
4 0
3 years ago
Read 2 more answers
Plsss help!!!<br>y = ??<br>X =???​
Lyrx [107]

Answer:

x=80* y=20* and X=100*

Step-by-step explanation:

If we assume PQ || OR then by alternate interior angles x is equal to 80 degrees and y is equal to 20 degrees.

We know that a triangle adds up to 180 degrees.

Angle ROX and XRO add up to 100 degrees. Leaving RXO equal to 80 degrees. (180-100=80).

By opposite angles, QXP is equal to 80 degrees also.

Then we are left with solving for X.

Supplementary angles add up to 180 degrees.

Subtract angle OXR from 180 and we are left with angle OXP = X = 100 degrees.

8 0
3 years ago
A spotlight can be adjusted to effectively light a circular area of up to 6 meters in diameter. To the nearest tenth, what is th
levacccp [35]
You would find the radius by halving the diameter. Then you use the equation
\pi \: r { }^{2}  =
and you get about 28.2 meters.
3 0
3 years ago
Other questions:
  • AB and DE are chords that intersect at point F inside circle C as shown. If the measure of arc EA= 50 degrees and the measure of
    15·1 answer
  • What are the differences between 0.08 and 0.8
    6·1 answer
  • .................PLZ HELP ME OUT.....
    5·1 answer
  • Uppose that x is a bernoulli trial with p = .30. determine the mean of x.
    8·1 answer
  • The poplution of Las vegas, Nevada has been increasing at an annual rate of 7.0%. If the poplution of las vegas was 478,434 in t
    9·1 answer
  • Solve the inequality. <br>-3 ≤ 2t ≤ 6​
    12·2 answers
  • Name:
    5·1 answer
  • Helpppppppppppppppppp
    10·2 answers
  • HELP I'M REALLY BAD AT MATH! :D
    5·2 answers
  • What is the solution to this equation?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!