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
olasank [31]
3 years ago
14

1+2+3+....+2012+2013

Mathematics
1 answer:
Marta_Voda [28]3 years ago
6 0

Answer:

Un=n(n+1)/2

U=2013(2013+1)/2

U=2.027.091

You might be interested in
An isosceles triangle has (5 points) A, at least two congruent sides B. two sides that are perpendicular C. three sides with the
aev [14]

Answer:

A. at least two congruent sides

Step-by-step explanation:

Since, we know that,

'An isosceles triangle is a triangle having two sides of equal length or at least two sides of equal length (special case is equilateral triangle)'.

Thus, from the options, we see that,

Options B, C and D are not correct.

<em>Since, congruent sides means that the lengths of the sides are equal.</em>

Thus, we get that,

'An isosceles triangle has at least two congruent sides'.

Hence, option A is correct.

4 0
3 years ago
Read 2 more answers
125% is equivalent to what number​
babymother [125]

125 is equivalent to

<em>1.25</em>

<em>1 1/4 </em>

<em></em>

Pick either one... 1.25 is more likely to be correct

<em></em>

<em></em>

6 0
3 years ago
Angie’s Bake Shop makes birthday chocolate chip cookies that cost $2 each. Angie expects that 13% of the cookies will crack and
Stella [2.4K]

I think it is $287....................

6 0
3 years ago
Let f(x) = 2x3 – 4x.<br> Find f(-2).
N76 [4]

Answer:

Step-by-step explanation:

f(x) = 2x^3 - 4x.....find f(-2).....so sub in -2 for x

f(-2) = 2(-2^3) - 4(-2)

f(-2) = 2(-8) + 8

f(-2) = -16 + 8

f(-2) = -8 <==

7 0
3 years ago
Read 2 more answers
The sum of the angle measures of any triangle is 180 degrees. Angle 2 is twice the measure of angle 1. Angle 3 is 15 degrees les
allochka39001 [22]

Answer:

Angle 1 = 39, Angle 2 = 78 , Angle 3 = 63

Step-by-step explanation:

78/2 = 39

(Angle 2/2 = Angle 1)

78 - 15 = 63

(Angle 2 - 15 = Angle 3)

39 + 78 + 63 = 180

(Angle 1 + Angle 2 + Angle 3 = 180)

7 0
4 years ago
Read 2 more answers
Other questions:
  • 2(3C + 2d) =<br><br><br> I don’t understand
    5·2 answers
  • How many ways are there to arrange 7 distinct red and 5 distinct blue balls in a row such that:?
    12·1 answer
  • The functions f(x) and g(x) are shown below:
    10·2 answers
  • Two men and 7 women can together do a piece of work in 4 days. It is done by 4 men and 4 women in 3 days. How long would it take
    11·1 answer
  • Express the following English phrase using an algebraic expression. The quotient of some number y and 6 increased by the product
    13·1 answer
  • A city of 6688 residents has an area of 16 square miles. What I the population density of the city
    11·1 answer
  • The function yp=3x2+4x is a particular solution to the nonhomogeneous equation y′′−6y′+9y=27x2−18 Find the general solution of t
    14·1 answer
  • A factory makes orange paint by mixing red paint and yellow paint in the ratio 7:2. The factory makes 2700 litres of orange pain
    11·1 answer
  • There are 7 girls and 9 boys on a playground.
    10·2 answers
  • If you know the volume of a rectangular prism and the area of the base, how can you find the height?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!