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
GalinKa [24]
3 years ago
11

What is the sum of the first 11 terms of the arithmetic series in which a1= -12 and d=5?

Mathematics
1 answer:
SVEN [57.7K]3 years ago
3 0
Hello :  
the terme general is : an = a1 +(n-1)d
 a11 = a1+(11-1)×5
a11 = -12+50
a11 = 38
<span>the sum of the first 11 terms is : S11 = (11/2)(a1+a11)
</span>S11 = (11/2)(-12+38)
S11 = 143
You might be interested in
What is 6 to the 4th power?
s2008m [1.1K]
The answer to 6 to the 4th power is 6•6•6•6=1,296
8 0
3 years ago
PLS I need help with this,
Over [174]

Answer:

5

Step-by-step explanation:

2:16-2:18=3

180ft-185ft=5

6 0
3 years ago
12. The ratio of clown fish to angelfish at a pet store is 5:4. The ratio of
777dan777 [17]

Answer:

a. There are 48 angelfish.

b. There are 36 goldfish.

Step-by-step explanation:

the ration of clownfish to angelfish is 5:4 and there are 60 clownfish.

60:? 5x=60 x=12 12(4)=48

60:48 there are 48 angelfish

the ration of angelfish to goldfish is 4:3 and know we know there are 48 angelfish

48:? 4x=48 x=12 12(3)=36

48:36 there are 36 goldfish

4 0
3 years ago
Read 2 more answers
Find the missing lengths.
Rama09 [41]

Answer:

x = 5√2

Step-by-step explanation:

The triangle on the right is a special right triangle, so we know that the adjacent side to 60° is 5. Since the left triangle is a 45-45-90, the hypotenuse is the leg times √2, so the value of x is 5√2

4 0
3 years ago
Suppose the diameter of a circle is 4 units. What is its circumference?
Murrr4er [49]
12.5663706144 or yes, 12.57
3 0
3 years ago
Other questions:
  • 38.91 what is the value of 8
    7·1 answer
  • Excellent! Move on to the 7th (or 8th if you count 0)<br> Fibonacci number.
    5·1 answer
  • What are the next three terms of each sequence?<br><br><br><br> -2, 4
    5·1 answer
  • Doug bought a pair of sneakers for $47.82 and a shirt for $13.36 if Doug had $100 before his purchase about how much money does
    12·2 answers
  • If a farmer ships 4 times as many oranges as tangerines. The farmer ships 8260 oranges. How many tangerines does he ship.
    15·1 answer
  • Paul has just enough money to buy either 5 erasers and 30 pencils or 10 erasers and 24 pencils. Each eraser costs $0.30. How muc
    14·1 answer
  • If a wall is 4 cm long and I draw a wall 16 cm long what scale is it?
    9·1 answer
  • answer whether or not 2/3 of 3/4 of a pan of brownies is the same amount as 3/4 of 2/3 of a pan of brownies
    9·1 answer
  • Solve for x
    10·1 answer
  • Anton is drawing a flag of switzerland, which has a square shape, for a school project. if he wants the flag to have sides that
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!