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dlinn [17]
3 years ago
11

1. Calculate exactly; (b) 3/4 + 2/3 + 4/5

Mathematics
1 answer:
Masja [62]3 years ago
5 0
2.2166666666 this is what I got man
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⦁ Find the sum of the series . 15 sigma n=1, (2n-1) Show your work
sergejj [24]

Answer:

225

Step-by-step explanation:

The sum of this series is given by the formula:

S_n=\frac{n}{2}[2a+(n-1)d]

Where

S_n is the sum

a is the first term (we get this by plugging in n = 1 into "2n-1", we have 2(1) - 1 = 1)

n is the number of terms (the sum is defined for n = 1 to n = 15, so 15 terms)

d is the common different (the difference is successive terms. Here, 2nd term would be 2(2) - 1 = 3, and first term was 1, so d = 3 -1 = 2)

<em>plugging in the info, we will get the sum:</em>

<em>S_n=\frac{n}{2}[2a+(n-1)d]\\S_{15}=\frac{15}{2}[2(1)+(15-1)(2)]\\=225</em>

<em>The sum is 225</em>

4 0
3 years ago
if i bottle flip a bottle 17 times and there is a ratio of 2 to 3 of it landing how many times will it land
blondinia [14]
The bottle will land about 11 out of the 17 times
hope i helped ( ಥـْـِـِـِـْಥ)
7 0
3 years ago
PLEASE HELP WILL MARK BRAINLIEST IN DECIMALS BTW
otez555 [7]

Answer:

11.7

Step-by-step explanation:

multiply RS by the scale factor to get R'S'

3 0
3 years ago
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A line segment has endpoints P(-1,5)and Q(5,2) find the coordinate of that trisect the segment​
musickatia [10]

Answer:

(1, 6).  The second is (-1 + 2 + 2, 1 + 1 + 1), or (3, 3)

Step-by-step explanation:

Moving from P to Q, we see that x increases by 6  and y increases by 3.

"Trisect" means "divide into three equal subintervals."

We find (1/3) of 6 (which comes out to 2) and (1/3) of 3 (which comes out to 1).  

Thus, the first junction (between 1st and 2nd trisection) is (-1 + 2, 5 + 1), or (1, 6).  The second is (-1 + 2 + 2, 1 + 1 + 1), or (3, 3)

5 0
3 years ago
Anyone wanna follow eachother on tiktok
erik [133]
This is a good question!!
4 0
3 years ago
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