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cricket20 [7]
2 years ago
8

May I please receive help?

Mathematics
1 answer:
Artyom0805 [142]2 years ago
6 0

4, -1/4 -1,

we can do this simply by

(y2-y1)/(x2-x1)

and simplifying

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Can someone please help my math assignment is due in 4 hours and I have no idea how to do these 2 problems
Nitella [24]

Answer:

hmmm

Step-by-step explanation:

I think its 3-5

8 0
3 years ago
Find the sum of the first 20 terms of the arithmetic sequence 4, -4, -12, -20​
Vsevolod [243]

Answer:

The sum of the first 20 terms is -1440.

Step-by-step explanation:

We want to find the sum of the first 20 terms of the arithmetic sequence:

4, -4, -12, -20...

The sum of an arithmetic sequence is given by:

\displaystyle S=\frac{k}{2}(a+x_k)

Where <em>k</em> is the number of terms, <em>a</em> is the initial term, and <em>x</em>_<em>k</em> is the last term.

Since we want to find the sum of the first 20 terms, <em>k</em> = 20.

Our initial term <em>a</em> is 4.

Our last term is also the 20th term as we want the sum of the first 20 terms.

To find the 20th term, we can write an explicit formula for our sequence. The explicit formula for an arithmetic sequence is given by:

x_n=a+d(n-1)

Where <em>a</em> is the initial term, <em>d</em> is the common difference, and <em>n</em> is the <em>n</em>th term.

Our initial term is 4. From the sequence, we can see that our common difference is -8 since each subsequent term is eight less than the previous term. Therefore:

x_n=4-8(n-1)

Then the last or 20th term is:

x_{20}=4-8(20-1)=4-8(19)=-148

Therefore, the sum of the first 20 terms are:

\displaystyle\begin{aligned} S_{20}&=\frac{(20)}{2}\left((4)+(-148))\\&=10(-144) \\&= -1440\end{aligned}

5 0
2 years ago
Read 2 more answers
The cost of 25 litres of petrol is Rs.1400.Find the cost of 30 litres of petrol.​
Leona [35]
Rs.1680

Liter. Rs
————-|————-
25 | 1400
:5( | ):5
5 | 280
x6( | )x6
30 | 1680
7 0
2 years ago
Aileen drives 208 miles in 4 hours. What is her speed in miles per hour? (label with "miles per hour")
77julia77 [94]

<u>Answer:</u>

52 miles per hour (mph)

<u>Step-by-step explanation:</u>

208 miles ÷ 4 hours = 52 miles per hour (mph)

<em>Hopefully this helps! Sorry if wrong. You are loved and you are beautiful/handsome!</em>

-Bee

7 0
3 years ago
The radius of Venus is 3,760.4 miles. What is the approximate volume of Venus?
sdas [7]
The radius of a sphere is calculated through the equation,
                             V = 4πr³ / 3
where r is the radius. Substituting the radius given in the equation,
                            V = 4π x (3,760.4 miles)³ / 3 = 2.23 x 10^11 miles
Thus, the volume of the planet Venus is calculated to be 2.23 x 10^11 miles, approximately. 
8 0
3 years ago
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