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yuradex [85]
3 years ago
10

Subtract this problem

Mathematics
1 answer:
galina1969 [7]3 years ago
6 0
I think it's 1.90. I am not fully sure about the answer if it's wrong.
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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
What is 3.5 rounded to the nearest hundredth?<br> HELP QUICK
PSYCHO15rus [73]
4.0!

3.5=350
thats is 4.0
5 0
3 years ago
Read 2 more answers
Write as a mathematical equation. The product of 5 and x is 25.
pickupchik [31]

answer:

5x=25

Divide 5 from both sides

5x/5=25/5

x=5

4 0
3 years ago
An electrician paid $398.40 total for 1,000 feet of wire.How much does he have to pay per foot a wire?
alexdok [17]

Divide the total spent by the total feet:

$398.40 / 1000 = 0.3984 per foot.

Round the answer as needed.

8 0
2 years ago
What are the next three terms of the following geometric sequence: 32, 48, 72...
lara [203]

32

,

48

,

72

,

108

,162

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
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