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
weqwewe [10]
3 years ago
6

Evaluate the summation of 2n+5 from n=1 to 12 29 36 216 432

Mathematics
1 answer:
rewona [7]3 years ago
3 0
\bf \sum\limits_{n=1}^{12}\ 2n+5\implies \sum\limits_{n=1}^{12}\ 2n+\sum\limits_{n=1}^{12}\ 5\implies 2\sum\limits_{n=1}^{12}\ n+\sum\limits_{n=1}^{12}\ 5
\\\\\\
2\cdot \cfrac{12(12+1)}{2}+(12\cdot 5)\implies 156+60\implies 216
You might be interested in
write the ratio as a fraction in simplest form. with whole numbers in the numerato and denominator. 40g : 64g​
babunello [35]

Answer:

\frac{5g}{8g} OR 5g : 8g

Step-by-step explanation:

Also a ratio can also be represented by a fraction; \frac{40g}{64g}

So to make the ratio to the simplest form we have to divide by a number that can divide both number.

40g : 64g

We can start dividing by 2 which will give us;

20g : 32g

\frac{20g}{32g}

Now we can divide by 2 again since it can divide both numbers which will give us;

10g : 16g

\frac{10g}{16g}

We can still divide by 2 since it can divide both numbers which will give us;

5g : 8g

\frac{5g}{8g}

Since no numbers can divide 5 and 8 equally that is our answer.

Also, \frac{5g}{8g}

8 0
3 years ago
what number must be added to 3 and 8 so that the ratio of the first number to the second number is equal to 3 :4​
Grace [21]
The answer is 12.
Steps
If that number is x
(3+x)/(8+x)=3/4
"Cross multply"
4(3+x)=3(8+x)
12+4x=24+3x
x=12
To check: add 12 to 3 and 8. 3+12=15 and 8+12=20. 15/20=3/4
3 0
3 years ago
Shade the model to 0.5 x 0.3
stellarik [79]
What model? also it would be 1/2 and 1/3
6 0
3 years ago
Read 2 more answers
In a trapezoid the sum of the bases is 28 and the area is 84.
oee [108]

Answer:   If you sketch this out, you should be able to convince yourself that if you drew a line parallel to the bases and halfway between them, and a vertical at the end of that line, there would be an extra triangle on the longer base that would just fit into the space at the end of the shorter base, if you cut and pasted it.

You should also be able to convince yourself by what you know about similarity that the length of that parallel halfway line is just halfway between the lengths of the bases (you can add them and divide by two).

So your trapezoid (trapezium, we call ’em this side of the pond) has the same area as a rectangle with an altitude equal to the trapezoid’s and a width equal to the sum of those bases divided by two. And since you know about rectangles, you’re home and dry. I suggest you do the sketch, fill in the numbers, and then you’ve completed a model piece of homework that should earn full marks and the teacher’s approval.

Step-by-step explanation:

3 0
1 year ago
Please help me with this one and explain to me how you found the answer
Aneli [31]

Answer:

i believe its a square :)

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • Cot x sec^4 x=cot x + 2tan x + tan^3 x
    5·1 answer
  • Anything that can be measured or counted
    12·1 answer
  • Please could someone help me with these questions sorry about the scribbling on one page I got stuck
    5·1 answer
  • Questions a - i click on it for full screen
    15·1 answer
  • Suppose you cut a square into two identical triangles what type of triangles will you make
    11·1 answer
  • Find the slope and y intercept of the equation : 2y-5x = 4
    10·1 answer
  • which choice is the graph of a line that is perpendicular to the line represented by the equation y = -2x + 7
    5·1 answer
  • A farmer plowed a rectangular section of land for a new crop. The section measures 3112 yd by 2313 yd. Find the total area, in s
    5·1 answer
  • Chapter 1:Qua
    10·1 answer
  • What does (x)(y) represent in math ​
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!