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3 years ago

Please help!! will give brainliest!

Mathematics

1 answer:

raketka [301]3 years ago

3 0

Answer:

Angle EDC = Angle ADC

(Reflexive property)

ABD ~ ECD because all angles are congruent

If two are congruent, third one has to be as well since total angle is 180 each

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S=a1/1-r

valentinak56 [21]

Answer:

Step-by-step explanation:

This is an infinite geometric series. 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.

First term:

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

Second term:

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

Let's see the common ratio: $\frac{\frac{3}{4}}{3}\\=\frac{3}{4}*\frac{1}{3}\\=\frac{1}{4}$

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

$s=\frac{a}{1-4}=\frac{3}{1-\frac{1}{4}}=\frac{3}{\frac{3}{4}}=3*\frac{4}{3}=4$

So, the answer is 4

4 0

2 years ago

What does the ratio 4: 18 represent in this situation?

andrezito [222]

Answer:

2:9 or 2/9

Step-by-step explanation:

I guess this question asks the simplest form of ratio 4:18

so I divided it by two and since they cannot be divided further that's the answer

you can either choose to write it in ratio form or fraction form that's your choice good day.

8 0

1 year ago

Consider the line 7x+6y=5.

ladessa [460]

Answer:

Slope of parallel line: -7/6

Slope of perpendicular line: 6/7

Step-by-step explanation:

7x + 6y = 5

6y = -7x + 5

y= -7/6x + 5/6

5 0

2 years ago

Answer choice D.) is 13/5 Please help, 10 points up!

Elan Coil [88]

c thats the answer :)

8 0

3 years ago

The answer to the question.

Dmitriy789 [7]

Answer:

0-4=-4 -4-9=-13

7 0

2 years ago