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Verdich [7]
3 years ago
10

Find the sum of the first 39 terms of the following series, to the nearest integer 7,15,23,...

Mathematics
1 answer:
sertanlavr [38]3 years ago
4 0

Answer:

6201

Step-by-step explanation:

formula for series in AP

where n is the nth term and a is first term and d is difference between two terms in series sum = \frac{n}{2} (2a \:  + (n - 1)d)

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Deer ticks can be carriers of either Lyme disease or human granulocytic ehrlichiosis (HGE). Based on a recent study, suppose tha
Dmitry_Shevchenko [17]

Answer:

There is a 100% probability that the selected tick is also a carrier of Lyme disease.

Step-by-step explanation:

The problem states that:

Of the ticks that carry at least one of these diseases in fact carry both of them.

So, if a tick carries one of these diseases, there is a 100% probability that is carries another.

What is the probability that the selected tick is also a carrier of Lyme disease?

There is a 100% probability that the selected tick is also a carrier of Lyme disease.

5 0
3 years ago
Х<br> 2+4 = 2(x - 1)?<br><br> Can someone help me out
ELEN [110]

Answer:

x=4/3

Step-by-step explanation:

2+4=2(x-1)    original

6=2(x-1)        combine like terms

6=2x-2         multiply x-1 by 2

8=2x            add 2 to both sides

4=x              divide both sides by 2

8 0
3 years ago
Read 2 more answers
Please help me I need the answer and work !!!!
nika2105 [10]
X=1, Y=-2. Heres your answer. It should be C
8 0
3 years ago
Read 2 more answers
D(v)=45, d(v)=1.1v+0.6v^2
a_sh-v [17]

Step-by-step explanation:

d(v)=1.1(45)+0.6(45)²

=1.1(45)+0.6(2025)

=49.5+1215

=1264.5

8 0
3 years ago
Please help me with algebra!<br> Don't answer if you don't know how to do it.
astra-53 [7]
This is all a bit complicated so try and stick with me on this one!

This one is the first problem in the first picture! a + 2 / a^2 + a - 1 / a + 1/ -a^2 - 2a - 1

= a^4 + a^3 - a^2 -  a / -a^5 - 3a^4 - 3a^3 - a^2

= -a^3 - a^2 + a + 1 / a^4 + 3a^3 + 3a^2 + a

= -a^3 - a^2 + a + 1/ a^4 + 3a^3 + 3a^2 + a

= (-a - 1) (a + 1) (a - 1) / a(a+ 1) (a + 1) (a + 1)

= -a + 1 / a^2 + a


The second problem in the first picture! 3x / y + 3x - y^2 / 3xy - 9x^2 + y^2 + 9x^2 / y^2 - 9x^2

= -81x^4y + 18x^2y^3 - y^5 / 243x^5 - 54x^3y^2 + 3xy^4


This one is for the last picture! 4y^2 + 4y + 1 / 4y - 8y^2 - 4y^2 + 1 / 4y + y 

= 16y^3 + 24y^2 / -32y^3 + 16u^2

= 16y + 24 / -32y + 16

= 2y + 3 / -4y + 2

I hope this was helpful!!!

Please remember to rate/thank/mark as brainliest if you see fit! (:



3 0
3 years ago
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