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
Allushta [10]
2 years ago
15

HELP DUE SOON EMERGENCY

Mathematics
1 answer:
algol [13]2 years ago
5 0

Answer:

The sum of the series is 44.

Step-by-step explanation:

Sigma notation. I just had a test on this, so this is pretty good timing.

Below the sigma, we see that k = 1. This means that 1 is the number you would substitute for k into the expression on the right to get the first term. In this case, the first term is -2. (2(1)² - 4)

Now, we can also find out the number of terms in the series by subtracting 1 (taken from k = 1) from the number on top of the sigma, 4, and then adding 1 to it.

4 - 1 + 1 = 4. This means there are 4 terms in the series.

See the remaining work in the attached file. You should get that the sum of the series is 44.

Hope this helps!

You might be interested in
Someone help. (Find the area of a rectangle with a lenght of 5a^2 b^4 and a width of (3ab^3)^2
Dmitry_Shevchenko [17]

Answer:

All you do is just multiply them.

Step-by-step explanation:

5a^2 b^4(3ab^3)^2=

45(a^(4))(b^(10))

3 0
3 years ago
The amount y (in cups) of flour is proportional to the number x of eggs in a recipe. The recipe calls for 6 cups of flour for ev
AlladinOne [14]
A. y=3/2x
B. y=3/2x
C. 18
 
My Dad helped me with this.
5 0
3 years ago
Solve the system of linear equations.
sweet-ann [11.9K]

Answer:

  • dependent system
  • x = 2 -a
  • y = 1 +a
  • z = a

Step-by-step explanation:

Let's solve this by eliminating z, then we'll go from there.

Add 6 times the second equation to the first.

  (3x -3y +6z) +6(x +2y -z) = (3) +6(4)

  9x +9y = 27 . . . simplify

  x + y = 3 . . . . . . divide by 9 [eq4]

Add 13 times the second equation to the third.

  (5x -8y +13z) +13(x +2y -z) = (2) +13(4)

  18x +18y = 54

  x + y = 3 . . . . . . divide by 18 [eq5]

Equations [eq4] and [eq5] are identical. This tells us the system is dependent, and has an infinite number of solutions. We can find them in terms of z:

  y = 3 -x . . . . solve eq5 for y

  x +2(3 -x) -z = 4 . . . . substitute into the second equation

  -x +6 -z = 4

  x = 2 - z . . . . . . add x-4

  y = 3 -(2 -z)

  y = z +1

So far, we have written the solutions in terms of z. If we use the parameter "a", we can write the solutions as ...

  x = 2 -a

  y = 1 +a

  z = a

_____

<em>Check</em>

First equation:

  3(2-a) -3(a+1) +6a = 3

  6 -3a -3a -3 +6a = 3 . . . true

Second equation:

  (2-a) +2(a+1) -a = 4

  2 -a +2a +2 -a = 4 . . . true

Third equation:

  5(2-a) -8(a+1) +13a = 2

  10 -5a -8a -8 +13a = 2 . . . true

Our solution checks algebraically.

6 0
3 years ago
One inch is equivalent to 2.54 centimeters. How many inches are in 50.8 centimeters
Genrish500 [490]
The answer is 20 ^-^.... i think
7 0
3 years ago
Read 2 more answers
Can anyone give me a hand with 18 and 19 please
Brums [2.3K]

Answer: (a-b)-(2x+y)

Step-by-step explanation: The answer for number 18. (The first pair of parentheses are optional.)

3 0
2 years ago
Read 2 more answers
Other questions:
  • for a field trip 4 students rode in cars and the rest filled nine buses. how many students were in each bus if 472 students were
    13·2 answers
  • At the top of a roller coaster hill you are 210 feet above ground. At the bottom of the hill you are 15 feet above ground. Write
    9·1 answer
  • Find the distance, c, between (0, 0) and (–4, –3) on the coordinate plane. Round to the nearest tenth if necessary.
    5·1 answer
  • What is 107-44=10+23+__
    6·2 answers
  • -4. (4 + 2) + 234 - 9<br> Answer here
    10·2 answers
  • The length of the diving board is 378 centimeters what is iys length in meters
    11·2 answers
  • Help please!!! This is a test and it's due is today. If anyone knows please help me I will mark as BRAINLIEST​
    8·1 answer
  • If f(x) = x2 + 1 and g(x) = x - 4, which value is equivalent to (fºg)(10)?
    9·2 answers
  • AREA
    9·1 answer
  • Given Limit of f (x) = negative 4 as x approaches c and Limit of g (x) = one-fifth as x approaches c. What is Limit of left-brac
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!