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
Vlad1618 [11]
2 years ago
10

Look at the table. Make a conjecture about the sum of the first 20 positive even numbers.

Mathematics
2 answers:
kirill [66]2 years ago
6 0

Answer:

Hence, the conjecture for the sum of first 20 positive integer is:

20×21=420

Step-by-step explanation:

The table is given as:

2                        = 2 =1.2

2+4                    = 6 = 2.3

2+4+6                = 12 = 3.4

2+4+6+8            = 20 = 4.5

2+4+6+8+10      = 30 = 5.6

Hence, we see the pattern as:

2+4+6+....+2n= n(n+1)

which is the sum of first n even positive integers.

Hence, we are asked to find the sum of first 20 positive even numbers that is we are asked to find the sum when n=20.

i.e. the sum of:

2+4+6+8+..........+40=20(20+1)

2+4+6+8+........+40=20×21=420.

Hence, the conjecture for the sum of first 20 positive integer is:

20×21=420

Ludmilka [50]2 years ago
3 0
It will be 20*21 based on the pattern in the chart
You might be interested in
Last year there were 120 students in choir. This year, 30% more students took choir. How many students are taking choir this yea
soldi70 [24.7K]

Answer:

156 students

Step-by-step explanation:

To find how many students are in choir this year, multiply 120 by 1.3

120(1.3)

= 156

So, this year, 156 students are taking choir

7 0
3 years ago
Read 2 more answers
436+789+6543-34+368-23=<br><br><br> 15 points
dmitriy555 [2]
The answer is 8079. :)

 
3 0
3 years ago
Read 2 more answers
If y varies directly with X and y =10 and X=4 write the direct linear variation equation .
rosijanka [135]
Y= kx   (k being a constant)
10= k × 4     k=5/2

y= 5x/2    The answer is C.
7 0
3 years ago
What does PEMDAS mean in math
Dahasolnce [82]

Hey there!

PEMDAS simply means (the OVERALL question answer)


• Parentheses
• Exponents
• Multiplication
• Division
• Addition
• Subtraction


Here’s an example

24 - 4^2 + 2 * 4

= 24 - 16 + 2 * 4

= 24 - 16 + 8

= 8 + 8

= 16

Thus, the answer for that equation is: 16


Often people remember PEMDAS by saying. (So, I’d advise you think of it like that way as well!)

• Please
• Excuse
• My
• Dear
• Aunt
• Sally


Good luck on your assignment & enjoy your day!


~Amphitrite1040:)

8 0
2 years ago
Write y=x^2-4x+4 in the form a(x+p)^2+q
lesantik [10]
Omg u can’t even figure out this? Why are you still going school
8 0
3 years ago
Other questions:
  • Maggie is x years old. Her brother Demarco is 4 years older than her. Anna is 3 times as old as Demarco. Write and simplify an e
    7·1 answer
  • The graph shows a system consisting of a linear equation and a quadratic equation. What is the solution to the system?
    7·1 answer
  • 4 divided by 5.6 divided by 7
    5·2 answers
  • What’s the answer? And why
    12·1 answer
  • What is the simplified form of x+8/4-x+5/4?
    15·2 answers
  • Answer please...................
    15·1 answer
  • Which function has a vertex on the y-axis? f(x) = (x – 2)2 f(x) = x(x + 2) f(x) = (x – 2)(x + 2) f(x) = (x + 1)(x – 2)
    12·2 answers
  • A(3,5) (x,y)-&gt;(x+2, y-4) What are the coordinates of A?​
    14·1 answer
  • Evaluate the expression when m=-6.3 and n= 5.6.<br> -3n+2m
    6·1 answer
  • If the output number y is -52 (y=5x-2) what is the input number? SHOW WORK
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!