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andrew11 [14]
3 years ago
6

Write an expression that gives the requested sum. the sum of the first 18 terms of the geometric sequence with first term 3 and

common ratio 2
Mathematics
1 answer:
alina1380 [7]3 years ago
8 0
I got 786432 when I use a(r^n-1)/(r-1)
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(x+2)^2 - (y+3)^2 factories this. Pls help me .​
alekssr [168]

Answer:x^2−y^2+4x−6y−5

Step-by-step explanation:

7 0
3 years ago
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A segment with endpoints A (3, 4) and C (5, 11) is partitioned by a point B such that AB and BC form a 2:3 ratio. Find B.
Dima020 [189]

Answer:

(3.8, 6.8)

Step-by-step explanation:

Point B:

Has coordinates (x,y)

AB and BC form a 2:3 ratio.

This means that:

B - A = \frac{2}{2+3}(C - A)

B - A = \frac{2}{5}(C - A)

We apply this both for the x-coordinate and for the y-coordinate.

x-coordinate:

x-coordinate of A: 3

x-coordinate of C: 5

x-coordinate of B: x

B - A = \frac{2}{5}(C - A)

x - 3 = \frac{2}{5}(5 - 3)

x - 3 = \frac{4}{5}

x = 0.8 + 3 = 3.8

y-coordinate:

y-coordinate of A: 4

y-coordinate of C: 11

y-coordinate of B: y

B - A = \frac{2}{5}(C - A)

y - 4 = \frac{2}{5}(11 - 4)

y - 4 = \frac{14}{5}

y = 2.8 + 4 = 6.8

Thus the correct answer is:

(3.8, 6.8)

7 0
3 years ago
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3.) A glass of water is being filled up slowly. It initially starts out with 4
maria [59]

Answer:

  8 minutes

Step-by-step explanation:

The amount in the glass after m minutes can be described by ...

  a = 4 + 3/2m

We want to find m when a=16, so ...

  16 = 4 + 3/2m

  12 = 3/2m . . . . . subtract 4

  8 = m . . . . . . . . . multiply by 2/3

It will take 8 minutes to fill the glass.

4 0
4 years ago
The first term of a geometric sequence is −8100 . The common ratio of the sequence is −0.1 .
pychu [463]

Answer:

-8100 x (-0.1)5

Step-by-step explanation:

8 0
3 years ago
Need help with exponential functions quick <br> 35 points!!!!!!!!!!!!!!!
Svetach [21]
Answer: What is the question????
6 0
4 years ago
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