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snow_tiger [21]
3 years ago
5

Please help I’m being timed

Mathematics
1 answer:
love history [14]3 years ago
4 0
A: D E F -------------
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S=a1/1-r
valentinak56 [21]

Answer:

4

Step-by-step explanation:

This is an <em>infinite geometric series</em>. This has a sum of  \frac{a}{1-r}

Where

a is the first term, and

r is the common ratio (one term divided by the previous term)

Let's figure out the first 2 terms by plugging in n = 1 first and then n = 2 for the series.

<u />

<u>First term:</u>

3(\frac{1}{4})^{n-1}\\=3(\frac{1}{4})^{1-1}\\=3(\frac{1}{4})^0\\=3(1)\\=3

<u>Second term:</u>

3(\frac{1}{4})^{n-1}\\=3(\frac{1}{4})^{2-1}\\=3(\frac{1}{4})^1\\=3(\frac{1}{4})\\=\frac{3}{4}

<em>Let's see the common ratio:  \frac{\frac{3}{4}}{3}\\=\frac{3}{4}*\frac{1}{3}\\=\frac{1}{4}</em>

<em />

<em>Thus we have a = 3 and r = 1/4</em><em>. Plugging into the formula of the infinite sum, we get:</em>

<em>s=\frac{a}{1-4}=\frac{3}{1-\frac{1}{4}}=\frac{3}{\frac{3}{4}}=3*\frac{4}{3}=4</em>

<em />

<em>So, </em><em>the answer is 4</em>

4 0
3 years ago
Which represents where f(x) = g(x)?
Lostsunrise [7]
<span>

function f(x), when x = 0 then f(0) = 4
</span>function g(x), when x = -4 then g(-4) = 4
so f(0) = g(–4) = 4

and

function f(x), when x = 4 then f(0) = 4
function g(x), when x = -2 then g(-2) = 4
so f(4) = g(–2) = 4

answer is 

d. f(0) = g(–4) and f(4) = g(–2)
6 0
4 years ago
Read 2 more answers
What is the length of the missing leg
sp2606 [1]

Answer:

4.33

Step-by-step explanation:

1. Pythagoras Theorem

25 = \sqrt{3^{2}+b^{2}}

2. Find b

5 = 3^{2}+b^{2}

b^{2} = 5-3^{2} = 5-9 = -4

but sqrt(-4) is not possible

b ≅ 4

OR (Require trig knowledge)

1. Sine Rule

\frac{a}{sin\alpha}=\frac{b}{sin\beta}=\frac{c}{sin\pi }

2. Plug in numbers

\frac{5}{sin90}=\frac{b}{sin60}=\frac{3}{sin30}

b ≅ 4.33

8 0
3 years ago
I am just completely lost and am unsure of how to approach this problem.
Anastasy [175]

Answer:

68°

Step-by-step explanation:

As BA⊥BD, so ∠ABD = 90°

also, ∠ABD = ∠CBD + ∠ABC

⇒ 90° = 4x + 52° + 8x - 10°

⇒  12x = 48°

⇒  x = 4°

now,

∠CBD = 4x + 52°

          = 4(4°) + 52°

          = 68°

5 0
3 years ago
Write an algebraic inequality for this real life example:
castortr0y [4]

Answer:

6 > 6 - a

3 < 3 + c

Step-by-step explanation:

Since you are told that there are less than six assignments, a represents what is taken away from the six. the result of 6 - a would be less than 6 itself.

Same concept can be connected with the other example. this time c is what you add to the 3 chores. The value of 3 + c will be greater than 3 itself

Hope this helps.

7 0
4 years ago
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