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svetoff [14.1K]
3 years ago
12

What is the sum of the first 20 terms of the AP 4,2,0

Mathematics
2 answers:
Evgesh-ka [11]3 years ago
5 0

Answer:

-420

Step-by-step explanation:

common difference= 2-4 =-2

we have,

first term=4

now using the formula,

S=N/2(2a+(n-1)d

so the answer is -420

77julia77 [94]3 years ago
4 0

bababbabababbababbabababbababa

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Amber is starting a garden. She plants 2 flowers the first month. The next month, she plans three times more flowers (6 flowers)
Artist 52 [7]
This is a geometric progression problem. We can the general formula that can tell us how many flowers would be planted each month.
Let's write the terms that we know and see if we can find the pattern:

\begin{tabular}{lll}
Month & Number of flowers planted & Different form            \\
1     & 2                         & 2\cdot3^0 \\
2     & 6                         & 2\cdot3^1 \\
3     & 18                        & 2\cdot3^2 \\
4     & 54                        & 2\cdot3^3
\end{tabular}
\end{table}
The patern here is obvious. Let's write it down:
N=2\cdot3^{n-1}
This formula gives us a number of flowers planted in the n-th month.
6 0
3 years ago
How many solutions does this linear system have? one solution: (0, 0) one solution: (1, –4) no solution infinite number of solut
Anna35 [415]

The system of equations has infinite solutions.

<h2>Given to us,</h2>
  • y=-6x+2
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<h3>Equation 2,</h3>

The value of y is already given in equation 1,

-12x-2y=-4

substituting the value of y in equation 2,

-12x-2(-6x+2)=-4\\-12x +12x-4=-4\\-12x+12x=-4+4\\0=0

The solution of the two equations is 0. Also, we can see that both the equations are in ratio.

Further, the image also shows that the line of the two equations are coinciding.

Hence, the system of equations has infinite solutions.

Learn more about System of solutions:

brainly.com/question/14264175

3 0
2 years ago
4w + x + 2y - 3z= -16
barxatty [35]
See photo. I hope it helps

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Answer:

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Step-by-step explanation:

You can also use mathpapa it's a calculator that gives you the answer and solves it for you step by step.

please mark me brainliest :)

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hopefully this will help ( ;

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