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
Vikki [24]
3 years ago
10

Which of the following represents the sum of 3+10+......+87+94 if the arithmetic series has 14 terms

Mathematics
2 answers:
AleksandrR [38]3 years ago
7 0

Answer:

679

Step-by-step explanation:

The formula for calculating the sum of an arithmetic progression which contains the first and the last term is expressed as;

Sn = n/2(a+l) where:

n is the number of terms in the series

a is the first term of the series

l is the last term of the series.

Given the series 3+10+......+87+94 which has 14terms,

a = 3

n = 14

l = 94

S3 = 14/2(3+94)

S3 = 7(97)

S3 = 679

nirvana33 [79]3 years ago
5 0
Here is a trick that not a lot of people know

(# of terms)*(first+last)/2
(in case you don't know, * means multiply and / means divide)


You might be interested in
A map is drawn with a scale of 1 inch= 15 miles. Nichol measured the distance to the next town as 3 inches. How many miles does
Nikolay [14]

Answer:

45 miles

Step-by-step explanation:

if 1 in = 15 mi     so put x=15

3 is 3 times 1 so x=3 and 3*15=45

Your answer is 45 miles.

7 0
3 years ago
what is an art and a science that deals with the collection,organization,creative presentation and analysis of data? A.physics B
DENIUS [597]

Answer:

The answer is B. Statistics

7 0
2 years ago
4c^2-8c-1=0 complete the square round to nearest hundredth
olga55 [171]
Move constant to other side
add 1
4c^2-8c=1
divide by 4 to make leading coeficient 1
c^2-2c=1/4
take 1/2 of linear coeficient and square it
-2/2=-1, (-1)^2=1
add that to both sides
c^2-2c+1=1/4+1
factor perfect squaer and add
(c-1)^2=5/4
square root both sides
c-1=+/-(√5)/2
add 1
c=1+/-(√5)/2

c=2.12 or -0.12
8 0
3 years ago
What is two plus two
kykrilka [37]

Answer:

Two plus two is four.

Step-by-step explanation:

Imagine you have two cookies. Then imagine you have two more cookies.

cookie  cookie

then you add

cookie  cookie

How many cookies do you have now?

8 0
4 years ago
What is an equation of the the line that passes through the point (3,6)and is parallel to the line 4x-3y=21
disa [49]

Answer:

y=4x/3+9/3

Step-by-step explanation:

slop is 4x/3

and the point is 3,6

so y-6 = 4x/3(x-3)

sove the you will have y=4x/3+9/3

7 0
3 years ago
Other questions:
  • Solve for x. Round to the nearest hundredth
    10·1 answer
  • 2cot^2x-3csc=0 find all solutions of the equation in the interval [0,2pi)
    5·2 answers
  • A thermometer reads 6 Fahrenheit two hours later it has dropped 20 Fahrenheit what is the new temperature
    5·1 answer
  • What is a correct name for the angle shown bellow​
    7·1 answer
  • An appliance dealer sold 40 tv sets during a special sale. Some of the sets were black-and - white models each selling at $119.
    15·1 answer
  • Zahra plans to draw a triangle with angles measuring 50° , 60°, and 70°. Which is true about Zahra plan?
    5·1 answer
  • You have 143 toy farm animals.<br><br> Round that number to the nearest ten.
    8·1 answer
  • Solve the System of Inequalities
    15·1 answer
  • The lengths of the sides of an equilateral triangle are 3(x + )cm, (5x +2y-1) cm and 5x +1 Cm Find the side length of the triang
    12·1 answer
  • - The sample space for a roll of two number cubes is shown in the table.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!