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
mote1985 [20]
3 years ago
10

What’s is the sum of the series?

Mathematics
1 answer:
STALIN [3.7K]3 years ago
7 0

Answer:

<h2>44</h2>

Step-by-step explanation:

\sum\limits_{k=1}^4(2k^2-4)\to a_k=2k^2-4\\\\for\ k=1:\\\\a_1=2(1)^2-4=2(1)-4=2-4=-2\\\\for\ k=2:\\\\a_2=2(2)^2-4=2(4)-4=8-4=4\\\\for\ k=3:\\\\a_3=2(3)^2-4=2(9)-4=18-4=14\\\\for\ k=4:\\\\a_4=2(4)^2-4=2(16)-4=32-4=28\\\\\sum\limits_{k=1}^4(2k^2-4)=-2+4+14+28=44

You might be interested in
Which of the following is equal to 7 1/3?<br> will give brainlist
Anestetic [448]

Step-by-step explanation:

c is the correct answer

7 0
3 years ago
What is the missing angle
Zielflug [23.3K]

55°

Step-by-step explanation:

110+15+x =180

x = 180 - 125

x = 55°

6 0
2 years ago
Read 2 more answers
What is y=-3x written in standard form
nataly862011 [7]
This would be 3x + y = 0.

I hope this helps!
5 0
3 years ago
Sheila lives in a $95,000 brick home in the country with contents valued at
omeli [17]

Answer:

Step-by-step explanation:

C

3 0
3 years ago
Find the value of x. Give reasons to justify your solution. C ∈ AE
saw5 [17]

Answer:

x = 11º

Step-by-step explanation:

1. Notice Parallel Lines

2. Understand Angle Relationships When Parallel Lines Are Present (e.g., alternate interior/exterior)

3. ∠CAB ≅ ∠DCA ∴ m∠CAB = 33º

4. Use exterior angle theorem: the sum of non-adjacent angles of the same triangle which the exterior angle is drawn is equal to the measure of that angle.

5. Therefore write and solve the equation 2x + 33º (sum of non-adjacent interior angles) = 5x (exterior angle).

  • 2x + 33 = 5x (C.L.T or <u>C</u>ombine <u>L</u>ike <u>T</u>erms)
  • 3x = 33 (inverse operations; divide by 3)
  • x = 11º (remember to apply units)
7 0
3 years ago
Other questions:
  • What is the square root of -1?
    5·2 answers
  • Compared to its parent function the transformation of the following : y= -3x - 3 + 4
    7·1 answer
  • If (x+2/2 = y/5, then which of the following must be true?
    10·1 answer
  • 7x+4x−2x=4 What is x??
    5·2 answers
  • You(or your parents) earn$53,698.00/yr and you have deductions of FICA(7.65%), federal tax withholding(11.5%), and state tax wit
    7·1 answer
  • Solve the equation -16x&gt;-80
    10·2 answers
  • Larry is buying a new video game that costs $35 plus 7% sales tax. How much will he pay for the video game with tax?
    5·1 answer
  • 1. At a bake sale, a dozen cookies sold for $4. This price was 80% of the original price. What was the original price?
    10·2 answers
  • tonya earned $5.00 she put half of the money into savings and kept the rest to spend.she bought a toy for $2.00.how much spendin
    14·1 answer
  • Is there a relationship between deforestation and Global climate change
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!