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
marusya05 [52]
3 years ago
8

Find the sum of the arithmetic series 3+8+13+..+438

Mathematics
1 answer:
irina [24]3 years ago
7 0

Answer:

19404

Step-by-step explanation:

sum of arithmetic series is

Sn = n/2 (2a + (n-1)d)

or

Sn = n/2 (a + an)

a = 1st unit

an = last unit

d = difference

8-3 or 13-8 so d = 5

then first step is to find the value of n

an = a + (n-1)d

438 = 3 + (n-1)5

438 - 3 = 5n - 5

435 = 5n - 5

435 + 5 = 5n

440 = 5n

n = 440/5

n = 88

then we can find the sum

Sn = 88/2 (3 + 438)

S88 = 19404

You might be interested in
Simplify the expression
lutik1710 [3]

Answer:

The answer is C.

Step-by-step explanation:

Multiplying the exponents is adding them together.

5 0
4 years ago
Read 2 more answers
HELP PLZ ASAP<br> whats the least common denominator if 1/8, 5/12, and 7/18 A.216 B.108 C.72 D.48
yanalaym [24]

Answer:

LCD = 72

Equivalent Fractions with the LCD

1/8 = 9/72

5/12= 30/72

7/18 = 28/72

Solution:

Rewriting input as fractions if necessary:

1/8, 5/12, 7/18

For the denominators (8, 12, 18) the least common multiple (LCM) is 72.

LCM(8, 12, 18)

Therefore, the least common denominator (LCD) is 72.

Calculations to rewrite the original inputs as equivalent fractions with the LCD:

1/8 = 1/8 × 9/9 = 9/72

5/12 = 5/12 × 6/6 = 30/72

7/18 = 7/18 × 4/4 = 28/72

6 0
3 years ago
Read 2 more answers
Which relation is not a function?
Mandarinka [93]

Answer:

c is not a fuction

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Write an equation of a line in slope intercept form that passes through
densk [106]

Answer:

Step-by-step explanation:

7 0
3 years ago
Translate the sentence into an equation. Twice the difference of a number and 4 is 9. Use the variable y for the unknown number.
gulaghasi [49]

Answer:

2x-4=9

Step-by-step explanation:

2x-4=9

2x=y

2x=13

6 0
3 years ago
Other questions:
  • The diagonals of a square are_____
    9·1 answer
  • Thereare62 rows of 9 chairs in the movie theater.About how many CA hairs are there?
    8·1 answer
  • What is the common ratio for the sequence 1, 4, 16, 64,...? 2 4
    15·2 answers
  • If y varies directly as x, and y is 18 when x is 5, which expression can be used to find the value of y when x is 11?
    15·1 answer
  • Question
    10·1 answer
  • Phil is riding his bike. He rides 15 miles in 3 hours, 30 miles in 6 hours, and
    13·1 answer
  • 3. What is the axis of symmetry of the graph of function f(x)=x^2 - 6x - 1
    5·1 answer
  • At Colin and Rosa's Smoothie Extravaganza, they create their most famous smoothie called Passionana.In
    8·1 answer
  • Please just help me simplify these NOT SOLVE THEM IF AT ALL POSSIBLE! THANKS!!!​
    5·1 answer
  • Solve for x : <br><br><br><br><img src="https://tex.z-dn.net/?f=25%20x%20%3D%2075" id="TexFormula1" title="25 x = 75" alt="25 x
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!