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
coldgirl [10]
3 years ago
8

Evaluate the arithmetic series. Please help me!!!

Mathematics
1 answer:
saw5 [17]3 years ago
7 0

Answer:

Step-by-step explanation:

∑1 to 18  (5n-4)

a1=5×1-4=1

a2=5×2-4=6

a18=5×18-4=86

n=18

S_{n}=\frac{n}{2} (a1+an)\\S_{18}=\frac{18}{2} (1+86)=9 \times 87=783

You might be interested in
What compass heading represents 20° north of west? PLS HELP
DerKrebs [107]

Answer:

West North West

Step-by-step explanation:

West North West would be the bottom half of North West after you split the compass heading into 2 again.

4 0
2 years ago
1/2x+4=20 solve for x.. Help?
hichkok12 [17]

Answer: 32

Step-by-step explanation: ok so here is what i do for those I grab a caculator (desmos online caculator i like to use but not required) then ill do (1/2×x)+4 but then once i write that i go back to the x delete the x and keep putting random numbers in higher and higher by one till the i get the answer (example: for this one i wrote that than i removed the x in it and did 1/2×5+4 then when that did not equal 20 i turned the 5 into a 6 then 6 was wrong so 7, then 8, then i just skipped to 20 then 20 was still wrong so skipped to 30, 30 was also wrong but CLOSE so then i tried 31 then 32 till the answer was 20 and when i did 32 it did say 20) hopes this helps

7 0
3 years ago
Read 2 more answers
The cube of the sum of a number and 8​
Kay [80]
What? I can’t understand. What do you need help on!
6 0
4 years ago
Read 2 more answers
Drag the correct steps into order to solve the equation −4x+12=−4 for x.
fiasKO [112]

The next step in this problem would be to subtract 12 form both sides. This would result in:

-4x = - 16

Then you would divide each side by -4.

x = 4

This would be your answer.

5 0
3 years ago
Read 2 more answers
4(2x + 3) = 5x + 3x - 6
Likurg_2 [28]

Answer:

No solution.

Step-by-step explanation:

4\left(2x+3\right)=5x+3x-6\\4\left(2x+3\right)=8x-6\\4\left(2x+3\right)\\(a=4,\:b=2x,\:c=3)\\=4\cdot \:2x+4\cdot \:3\\=8x+4\cdot \:3\\=8x+12\\8x+12=8x-6\\8x+12-12=8x-6-12\\0=-18

If the final answer is 0 and both sides of this equation are unbalanced, that means there will be no solution.

3 0
1 year ago
Other questions:
  • PLEASE HELP: What is the measure of an exterior angle of a regular 13-sided polygon? WILL GIVE BRAINIEST AND 60 POINTS
    5·2 answers
  • PLS HELP ME WITH THIS QUIZ IF YOU WANT A BRAINLIEST PLS
    10·2 answers
  • Prove the proposition p (0), where p (n) is the proposition "if n is a positive integer greater than 1, then n2 > n." what ki
    10·1 answer
  • Help me pleaseeeeeee
    12·2 answers
  • Please dine one help me!?!?!?!?!?!?!?!?!?!?
    10·1 answer
  • Which operation should be performed first according to the order of operations? 44 • 2 – [(5 + 20 • 3) – 12] + 16 ÷ 2 A. 44 • 2
    13·2 answers
  • Add.
    15·2 answers
  • What is the slope of the line that passes through the pair of points (-1, 4), (3,12)​
    13·1 answer
  • PLZ ANSWER AND SHOW WORK TY :D
    13·1 answer
  • What is the quotient of 8,595 ÷ 24?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!