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
Nikolay [14]
3 years ago
15

S=n(a1+an)/2 gives the partial sum of an arithmetic sequence. What is the formula solved for an?

Mathematics
2 answers:
Veseljchak [2.6K]3 years ago
6 0
S = n(a1 + an)/2
2S = n(a1 + an)
2S = na1 + nan
nan = 2S - na1
an = (2S - n a1)/n
Oksana_A [137]3 years ago
5 0

Just took the quiz.

The answer is an=2S-a1n/n

You might be interested in
The nut shack sells cashews for $6.00 per pound and Brazil nuts for $5.00 per pound. How much of each type should be used to mak
Kay [80]

Answer:

Number of pounds of cashews = x = 14.96 pounds

Number of pounds of Brazil nuts = y = 19.04 pounds

Step-by-step explanation:

Let us represent:

Number of pounds of cashews = x

Number of pounds of Brazil nuts = y

The nut shack sells cashews for $6.00 per pound and Brazil nuts for $5.00 per pound. How much of each type should be used to make a 34 pound mixture that sells for $5.44 per pound

Our system of equations is given as:

x + y = 34...... Equation 1

x = 34 - y

6x + 5y = 34 × 5.44

6x + 5y = 184.96.......Equation 2

Ww substitute : 34 - y for x in Equation 2

6(34 - y) + 5y = 184.96

204 - 6y + 5y = 184.96

Collect like terms

- 6y + 5y = 184.96 - 204

-y = -19.04

y = 19.04 pounds

Solving for x

x = 34 - y

x = 34 - 19.04

x = 14.96 pounds

Number of pounds of cashews = x = 14.96 pounds

Number of pounds of Brazil nuts = y = 19.04 pounds

7 0
2 years ago
Please help! Which of the following would result in an integer?
podryga [215]

Answer:

B

Step-by-step explanation:

Cube root of 27 is 3, which is in integer

5 0
1 year ago
Which pair of angles are congruent or supplementary
Fittoniya [83]
Angles 1 and 3 are supplementary
6 0
2 years ago
23. Which number below could not be used to<br><br><br> PLEASEE HELP!!
il63 [147K]
0.75 i think so lol HI
6 0
2 years ago
Researchers once surveyed students on which superpower they would most like to have. The following two-way table displays data f
lorasvet [3.4K]

Answer:

50%

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • Find the slope of a line that passes through the points (-5, 4) and (1, -8) using the slope formula. The best answer will receiv
    12·1 answer
  • A special 8-sided die is marked with the numbers 1 to 8. It is rolled 20 times with these outcomes: 3 4 5 2 7 1 3 7 2 6 2 1 7 3
    13·1 answer
  • What is the equation of the following graph in vertex form?
    6·1 answer
  • if the product of two positive fractions a and b is 15/56 find three paris of possible values for a and b
    9·1 answer
  • I need answers please​
    12·1 answer
  • Lexi measured the dolls in her collection so she could build a new display case the 7 dolls heights were 7in 5in 6in 9in 8in 9in
    6·1 answer
  • Tom has 4 and one half cases of soda. If there are 12 cans in a case, how many cans does tom have?
    10·1 answer
  • Deborah bought a computer for 25% off the list price. If the list price is $2,428, how much did Deborah spend? A. $607 B. $1,821
    9·1 answer
  • Dave's father is paying him to paint the storage
    7·1 answer
  • Which equation represents this sentence?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!