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
ikadub [295]
2 years ago
13

Find the sum of the even integers from 20 to 50.with solutions please help​

Mathematics
1 answer:
alina1380 [7]2 years ago
7 0

Answer: 560

Step-by-step explanation:

There are [20, 22, 24, 26, 28]: 5 even integers for each ten numbers.

The 20's set can be written as 5*20 + (2+4 + 6 + 8) = 5*20 + (20) = 120

The 30's can be written: 5*30 + 20 = 170

40's: 5*40+20 = 220

50's: 5*50+20 = 270

60's: 5*60+20 = 320

Each set is incremented by 50

We want the sets for 20, 30, and 40, plus the number 50.

(120+170+220+50) = 560

You can also do this in Excel (attached). Set the first cell to 20, the next cell below equal to the cell above plus 2. Then draw the second cell down until you've reached 50. Then sum the cells to arrive at 560.

You might be interested in
7.
vodka [1.7K]

Answer:

28 ft

Step-by-step explanation:

4 0
3 years ago
Erin writes the expression “ $6$ less than double a number.”
bixtya [17]

For this case we must algebraically rewrite the given expression. So:

x: It is the variable that represents an unknown number

"double a number" is represented as: 2x

"6 less than double a number" is represented as: 2x-6

So, the final expression is: 2x-6

If we want to rewrite the expression in an equivalent way, we take common factor 2:

2 (x-3)

Asnwer:

2x-6

Equivalent expression: 2 (x-3)

3 0
3 years ago
X³ by a³ + a³by x³=p x³by a³- a³by ³=q eliminate x
sasho [114]

Answer:

Step-by-step explanation:

\frac{x^3}{a^3} +\frac{a^3}{x^3} =p\\\frac{x^3}{a^3} -\frac{a^3}{x^3} =q\\adding\\2\frac{x^3}{a^3} =p+q\\\frac{x^3}{a^3} =\frac{p+q}{2} \\substitute~in~first\\\frac{p+q}{2} +\frac{2}{p+q} =p\\\frac{(p+q)^2+4}{2(p+q)} =p\\(p+q)^2+4=2p(p+q)\\p^2+q^2+2pq+4-2p^2-2pq=0\\q^2-p^2+4=0\\q^2=p^2-4

6 0
2 years ago
Which equation is true for the value b= 10?
ArbitrLikvidat [17]
The answer to the question is D
7 0
2 years ago
Read 2 more answers
Elvie can type 4,200 words in 30 minutes givr the ratio of the time in minutes to the number of words
defon

Answer:

1 : 140

Step-by-step explanation:

Ratio is 30 : 4200

Divide both numbers by 30:-

= 1 : 140   (answer)

4 0
3 years ago
Other questions:
  • Which of the following side lengths can form a triangle?
    15·2 answers
  • The radius of a circular baking tray is 6 cm. Find its area correct to 2 decimal places. Use the π button on your calculator for
    8·1 answer
  • Round this to the nearest thousand. 4,589,215
    5·2 answers
  • Evaluate A = bh, for b = 8 and h = 4
    9·1 answer
  • A ²-3ac+c ² if a=-2/3 and c=1/5
    13·1 answer
  • Question is in the picture, please help me
    10·1 answer
  • Help help help help help help help
    11·2 answers
  • Farell has a gift card with a 45 balance he bought some bags of chips that cost 2.50 each after his perchase his gift card balan
    6·1 answer
  • Talk about how you can use math in your everyday life after high school
    8·2 answers
  • Tim has some marbles.
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!