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
Misha Larkins [42]
2 years ago
12

. Find the sum of the first 20 terms of the arithmetic sequence 27, 22, 17, ....

Mathematics
1 answer:
valkas [14]2 years ago
8 0

Answer:

Step-by-step explanation:

a = 27

n = 20

d = -5

L20 = 27 + (n - 1)*d

L20 = 27 + (20-1)*_5

L20 = 27 + 19*-5

L20 = -68

Sum = (a + L)*n/2

Sum = (27 - 68)*20/2

Sum = -41 * 10

Sum = - 410

You might be interested in
12+3y+y=?<br> What is the answer?
puteri [66]

Answer:

12+4y

Step-by-step explanation:

12+3y+y=12+4y

3 0
3 years ago
Read 2 more answers
I NEED HELP WITH THIS ASAP
grin007 [14]
hopefully someone helps u with this tho sorry
3 0
2 years ago
One person can do a certain job in 20 minutes and another person can do the same job in twenty eight minutes. how many minutes w
Mamont248 [21]
I'm terrible at math, so I'm sorry if I'm totally wrong, but I'm assuming you just take the average:

20+28=48m
48/2=24m

On average, it may take them 24m if they work together.
8 0
4 years ago
Select interior, exterior, or on the circle (x - 5) 2 + (y + 3) 2 = 25 for the following point. (2, 3)
lozanna [386]
Standard equation of a circle: <em>(x-h)² + (y-k)² = r²</em> where <em>(h, k)</em> is the center and <em>r </em>is the radius. In the case of our equation here, <em>(x-5)² + (y+3)² = 25</em>, we can conclude that our circle has a center at (5, -3) and a radius of 5 units.

We can use the distance formula with the center (5, -3) and our point (2, 3) to see how far away they are...if the distance between them is less than the radius of the circle, it is on the interior. If it's equal, it's on the circle. If it's greater, it's on the exterior.

Distance = \sqrt{(y_2-y_1)^2+(x_2-x_1)^2}

Distance = \sqrt{(-3-3)^2+(5-2)^2}

Distance = \sqrt{(-6)^2+3^2}

Distance = \sqrt{36+9}

Distance = \sqrt{45}\approx6.7082

6.7082>5,\ so\ (2,3)\ is\ on\ the\ \boxed{exterior}
8 0
3 years ago
In a video game, the chance of rain each day is always 30%. At the beginning of each day in the video game, the computer generat
Scorpion4ik [409]

Answer:

I would divide 50 by 4 (Because there are usually 4 weather conditions in game) and whichever the number is closest to it would pick that weather condition

8 0
3 years ago
Other questions:
  • the states C&amp;D spend a total of 55.6 million dollars for tourism the state C spends 3.2 million dollars more than State D fi
    7·1 answer
  • Which of the following statements is not true?
    9·1 answer
  • The stadium has a form of a rectangle with two semicircles attached to the short sides. The long side of a rectangle is 2 times
    9·1 answer
  • Which numbers are rational
    11·2 answers
  • How do you solve 34.86×1.2
    14·2 answers
  • How to simply the radical
    5·1 answer
  • Mr. Azu invested an amount at rate of 12% per annum and invested another amount, 580 ghana cedis more than the first at 14% . if
    10·1 answer
  • Which statement is true?
    9·1 answer
  • Which quadratic function is represented by the graph?
    8·1 answer
  • Elena collects 112 specimens of beetle and records their lengths for an ecology research project. When she returns to the labora
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!