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3 years ago

I don’t understand???

Mathematics

2 answers:

Lana71 [14]3 years ago

5 0

Its D because the arrow is facing away from 50 so that means she will have at least 50 then it says 6m and m stands for month soo 6 new shells every month and she already has 8. I hope my answer helps i might sound kinda confusing sorry

Novosadov [1.4K]3 years ago

4 0

Answer:

Step-by-step explanation:

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What is 3.872 in word form

d1i1m1o1n [39]

Three and eight hundredth seventy two thousandth

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4 years ago

Can someone help me QUICK lol sorry!! B is the midpoint of AC. If AB=8x+2, and BC = 4x+18. Find AC

dalvyx [7]

Answer:

AC = 12x + 20

Step-by-step explanation:

Combine the terms:

AB + BC = AC

AB = 8x + 2

BC = 4x + 18

Plug in the corresponding terms to the corresponding variables:

(8x + 2) + (4x + 18) = AC

AC = 8x + 4x + 18 + 2

AC = 12x + 20

12x + 20 is your answer for AC.

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3 years ago

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DerKrebs [107]

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3 years ago

What is the sum of the geometric series

lbvjy [14]

If $S$ denotes the sum of the first $n$ terms of a geometric series with first term $a$ and common ratio $r$ , then

$S=a+ar+ar^2+\cdots+ar^{n-3}+ar^{n-2}+ar^{n-1}$
$rS=ar+ar^2+ar^3+\cdots+ar^{n-2}+ar^{n-1}+ar^n$
$\implies S-rS=a+(ar-ar)+(ar^2-ar^2)+\cdots+(ar^{n-1}-ar^{n-1})-ar^n$
$\implies (1-r)S=a(1-r^n)$
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Using summation notation, you have

$S=\displaystyle\sum_{x=1}^nar^{x-1}=\sum_{x=0}^{n-1}ar^x=a\dfrac{1-r^n}{1-r}$

In this case, you have $a=2$ , $r=\dfrac12$ , and $n=16$ . So the value of the sum is

$\displaystyle\sum_{x=0}^{15}2\left(\frac14\right)^x=2\dfrac{1-\left(\frac14\right)^{16}}{1-\frac14}\approx2.67$

Rounded to the nearest whole number, the answer would be 3.

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4 years ago

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