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
masya89 [10]
3 years ago
13

Given the Arithmetic series A 1 + A 2 + A 3 + A 4 A1+A2+A3+A4 14 + 18 + 22 + 26 + . . . + 86 What is the value of sum?

Mathematics
1 answer:
postnew [5]3 years ago
7 0

Answer:

950

Step-by-step explanation:

The common difference is 4, so the general term can be written:

... an = 14 + 4(n -1)

The value of n for the last term is ...

... 86 = 14 + 4(n -1) . . . . . the computation for the last term, 86

... 72 = 4(n -1) . . . . . . . . . subtract 14

... 18 = n -1 . . . . . . . . . . . divide by 4

... 19 = n . . . . . . . . . . . . . add 1

Your series has 19 terms. The first term is 14 and the last is 86, so the average term is (14+86)/2 = 50. Since there are 19 terms, the sum of them is ...

... 19×50 = 950

You might be interested in
Triangle G E F is shown with its exterior angles. Line G F extends through point B. Line F E extends through point A. Line E G e
Radda [10]

The measure of angle ∠EGF is 65°. And the measure of the angle ∠CGE is 115°.

<h3>What is the triangle?</h3>

A triangle is a three-sided polygon with three angles. The angles of the triangle add up to 180 degrees.

Triangle GEF is shown with its exterior angles.

Line GF extends through point B.

Line FE extends through point A.

Line EG extends through point C.

Angles ∠FEG and ∠EGF are congruent.

∠FEG = ∠EGF = x

Sides EF and GF are congruent.

Angle ∠EFG is 50° degrees.

∠EFG + ∠FGE + ∠GEF = 180°

                  50° + x + x = 180°

                               2x = 130°

                                 x = 65°

∠FEG = ∠EGF = 65°

Then angle ∠CGF will be

∠CGF + ∠FGE = 180°

   ∠CGF + 65° = 180°

             ∠CGF = 115°

More about the triangle link is given below.

brainly.com/question/25813512

#SPJ1

4 0
2 years ago
Help me please?! I’ll give brainliest
aliina [53]

Answer: 8/27 cubic yards

Step-by-step explanation:

Volume of cube = side length ³

(2/3)³ = 2³ / 3³ = 8 / 27

5 0
3 years ago
Round to the nearest cent $6.51
son4ous [18]
Answer: $6.50
If the number is below 5 (so 1-4) you round down. If its above 5 (5-9), you round up.
E.G. 78.89 
Round this to the nearest 10th, you'll get 78.90

4 0
4 years ago
Melissa and her friends are stretching rubber bands for an activity in science class. Melissa stretched her elastic to 10 inches
Butoxors [25]
Melissa, Juan, Sara, and Marsha.

Hope this helps! :)
4 0
3 years ago
The packaging lists a model airplane’s length as 10.5 in. It also gives the scale as 1:83. What is the length of the actual airp
Lana71 [14]
\bf \cfrac{\stackrel{model}{length}}{\stackrel{actual}{length}}\qquad 1:83\qquad \cfrac{1}{83}\implies \cfrac{1}{83}=\cfrac{10.5}{x}\implies x=\cfrac{83\cdot 10.5}{1}&#10;\\\\\\&#10;x=871.5~inches&#10;\\\\\\&#10;\textit{there are 12 inches in 1 foot, thus }&#10;\\\\\\&#10;871.5~\underline{in}\cdot \cfrac{ft}{12~\underline{in}}\implies 72.625~ft &#10;\qquad \approx 73~ft
6 0
3 years ago
Other questions:
  • Simplify completely ((x2-4x+4)/(x2+10x+25)) x ((x+5)/(x2+3x-10)) ...?
    12·1 answer
  • The expression c-e, where c stands for the money collected and e stands for the expenses, is used to find the profit from a bask
    11·1 answer
  • What are the coefficients in the polynomial 7x^2 -4x+6
    14·1 answer
  • If Anne can type 8 words for every 5 words. James can type if James can type 150 words how many words can Anne type? HELP PLEEEA
    14·2 answers
  • How many positive integers are in the solution set of the inequality below? -2x + 1 ≥ -6
    12·2 answers
  • Gina wants to ride bikes and the waves at Flagship Pier in Galveston. She rents a surfboard and a bicycle for 2 hours each. The
    15·1 answer
  • PLEASE HELP WHEN YOU SEE THIS
    6·1 answer
  • How many mL are there in 3,700 microliters?
    14·2 answers
  • An athlete runs two miles in 13.5 minutes. How many minutes is this per mile?
    5·1 answer
  • What is the HCF of two consecutive odd numbers? for 50 points​
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!