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
Nana76 [90]
3 years ago
14

Finding the sum. imaginary numbers! hellpp

Mathematics
1 answer:
Neko [114]3 years ago
3 0
The "i" in this problem actually doesn't represent imaginary numbers. This is a summation problem which is asking for the sum of (2i+1) for when i = 1 to i = 7.

So (2(1) + 1) + (2(2) + 1) + (2(3) + 1) + (2(4) + 1)... etc...

The summation rules we need to know for this problem are for constants and for a single variable.

When we have a constant, the summation rule is n*c where n is the number of times.

When we have a single variable, the summation rule is n(n+1)/2.

So applying the summation rules where n = 7:

2(7)(7+1)/2 + 1(7)

(7)(8) + 7 = 63

The answer to the summation is 63.
You might be interested in
Elsa tries to solve the following equation, and determines there is no solution. Is she correct? Explain.
Vlad [161]
Elsa's answer is incorrect since there is a solution of the given equation. In the given logarithmic problem, we need to simplify the problem by transposing log2(3x+5) in the opposite side. The equation will now be log2x-log2(3x+5)=4. Using properties of logarithm, we further simplify the problem into a new form log (2x/6x+10)=4.  Then transform the equation into base form 10^4=(2x/6x+10) and proceed in solving for x value which is equal to 1.667. 
3 0
3 years ago
Read 2 more answers
Pls help asap!!!<br><br><br><br> Solve for x . 2x=y
OLEGan [10]
The answer to this question is 0
6 0
2 years ago
Anna enjoys dinner with her family at a restaurant in Washington, D.C. She leaves a 15% tip on the price of her meal. She also h
AnnZ [28]

Answer:

$22

Step-by-step explanation:

tax and the tip increase the price paid for the meal

she paid 15 + 10 = 25% more than the price of her meal

p = original price

1.15 x p = 27,50

p = 27.50 / 1.15 = 22

3 0
2 years ago
12= 0.5a <br> HELP ME PLEAS E ULL GET BRAINLIEST
Anna11 [10]

Answer:

a=24 0.5x24=12

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
You purchased 100 shares of stock valued at $55 per share. The stock value increases to $85 per share. What was the rate of incr
guapka [62]
Answer: $30 per share.

Explanation:
55 + x = 85
-55 -55
x 30
x = 30
6 0
3 years ago
Other questions:
  • Lemonade stand math problem
    8·1 answer
  • Which of the following angles is coterminal with -4pi/3?<br><br> -2pi/3<br> -pi/3<br> pi/3<br> 2pi/3
    12·1 answer
  • Mixed number as a decimal. 8 1/10
    14·1 answer
  • PLZ HELP IM 100% LOST ON THIS
    10·1 answer
  • Whats the answer to this question
    10·1 answer
  • A monk crossbred​ plants, which can have purple or white​ flowers, and obtained 552 plants with white flowers and 351 plants wit
    6·2 answers
  • Favorite Lunch Choice
    12·1 answer
  • After the booster club sold 40 hotdogs at a football game, it had $90 In protit.
    10·1 answer
  • What value completes this expression?<br><br> 4m + ____m = 4m (1 + 6)
    9·1 answer
  • ARRANGE &amp; ADD THE FOLLOWING<br> a) 4301 +8613 b) 7649 + 326
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!