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babymother [125]
3 years ago
8

What is the sum of the geometric sequence 3, 15, 75, … if there are 8 terms?

Mathematics
2 answers:
lidiya [134]3 years ago
6 0

Answer:

292,968

Step-by-step explanation:

Step 1: Use geometric sequence formula s_n=\frac{a1r^n}{1-r}

S_n & n= the sum of geometric sequence & terms in total (8)

r= common ratio (5)

a_1= first term in sequence (3)

<h2>s_8=\frac{3(5)^(^8^)}{ 1-5 }\\s_8=\frac{(3)390625}{-4}\\s_8= \frac{1171875}{ -4 }\\s_8=292968</h2><h2 />

Firlakuza [10]3 years ago
4 0
If you would like to know the sum of the geometric sequence, you can calculate this using the following steps:

3, 15, 75, 75 * 5 = 375, 375 * 5 = 1875, 1875 * 5 = 9375, 9375 * 5 = 46875, 46875 * 5 = 234375

<span>3 + 15 + 75 + 375 + 1875 + 9375 + 46875 + 234375 = </span>292,968

The correct result would be 292,968.
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I'm really bad at age chart problems.<br> Can someone help me with this and provide an explanation?
Fed [463]

Answer: 10

Step-by-step explanation:

tony is 5 years younger than Marvin's age 1 year from now.

t = (m+1) - 5

t = m - 4

6 years ago tony was half as old as marvin was then.

t - 6 = 1/2(m - 6)

Get rid of the fraction, multiply both sides by 2

2(t-6) = m - 6

2t - 12 = m - 6

2t = m - 6 + 12

2t = m + 6

from the first statement, replace t with (m-4)

2(m-4) = m + 6

2m - 8 = m + 6

2m - m = 6 + 8

m = 14 is Marvin's present age

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how old is tony now?

t = 14 - 4

t = 10 yrs is tony's age

4 0
3 years ago
What two consecutive integers does 20−−√ fall between?
Alex_Xolod [135]

Answer:

4 and 5

Step-by-step explanation:

8 0
3 years ago
Find the value of that makes m ll n.
Alja [10]

Answer: x = 108

Step-by-step explanation: In this problem, we're given a diagram and

we're asked to find the value of x that would make m ll n.

We can see that the angles that are marked in the diagram

are same-side interior angles since they lie on the same side

of the transversal and they lie on the interior of lines m and n.

Therefore, in order for line m to be parallel to line n,

these angles must be supplementary.

In other words, they must add to 180 degrees.

So we can setup the equation x + 72 = 180.

Subtracting 72 from both sides gives us x = 108.

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8 0
3 years ago
Compared to its parent function the transformation of the following : y= -3x - 3 + 4
astra-53 [7]
The answer is B
Hope it helps!!
6 0
3 years ago
The graphs of three functions are shown.
satela [25.4K]

Answer:

  • The square root and quadratic function share a y-intercept.
  • The range of the square root and absolute value function are the same.

Step-by-step explanation:

Y-intercepts are the same when the curves meet the y-axis at the same point. That is true of the root and quadratic functions.

X-intercepts are the same when the curves meet the x-axis at the same point. None of these functions share an x-intercept.

The ranges of the functions are the same when they have the same vertical extent. The range of the quadratic is different from the range of the other two functions.

The absolute value and root functions have the same minimum (lower end of their range). That is the same as the maximum of the quadratic function.

__

The statements that match the graphs are ...

  • The square root and quadratic function share a y-intercept.
  • The range of the square root and absolute value function are the same.
7 0
3 years ago
Read 2 more answers
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