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damaskus [11]
3 years ago
13

How to figure out algebra

Mathematics
1 answer:
stiv31 [10]3 years ago
7 0
Use pemdas . if you are figuring out x or a letter always get it on the left. and try to make it positive for example " 28=7x " you would change it to "7x=28" next step would be to get the letter alone. so you divide each side by 7 so you end up with " x= 4"
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Find the first, fourth, and eighth terms of the sequence. A(n) = –5 • 3n–1 please help me
Korvikt [17]

Answer:

First term: -10

Fourth term: -55

Eighth term: -115

Step-by-step explanation:

I am assuming the means -5(3n-1). To find the first term, plug in 1. You will get -5(3*1-1) or -5*2 or -10.

To find the fourth term, plug in 4. You will get -5(3*4-1) or -5*11 or -55.

To find the eighth term, plug in 8. You will get -5(3*8-1) or -5*23 or -115.

So the answers are -10, -55, and -115.

6 0
3 years ago
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Please help will mark brainliest
Nuetrik [128]

Answer:

c

Step-by-step explanation:

6 0
3 years ago
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3.<br> Find the value of X 11x-2 19x+3 9x+1 PLEASE LOOK AT PICTURE
Mila [183]

Answer:

x=4

Step-by-step explanation:

1) first write it down --> 11x-2+9x+1=19x+3

2) then combine like terms on the left side of the equation. --> 20x-1=19x+3

3) Then subract 19x on both sides --> x-1=3

4) After add 1 to both sides --> x=4

5 0
4 years ago
Which equation represents a proportional relationship that has a constant of proportionality equal to –10?
o-na [289]
The answer to your question is c.

6 0
3 years ago
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According to a study conducted by an​ organization, the proportion of Americans who were afraid to fly in 2006 was 0.10. A rando
Nimfa-mama [501]

Answer: No, this is not necessarily evidence that the proportion of Americans who are afraid to fly has increased.

Step-by-step explanation:

Since we have given that

n = 1400

x = 154

So, \hat{p}=\dfrac{154}{1400}=0.11

and p = 0.10

So, hypothesis would be

H_0:\hat{p}=p\\\\H_a:\hat{p}>p

So, the test statistic value would be

z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}\\\\z=\dfrac{0.11-0.10}{\sqrt{\dfrac{0.1\times 0.9}{1400}}}\\\\z=\dfrac{0.01}{0.008}\\\\z=1.25

At 5% level of significance,

critical value would be 1.96.

Since 1.96>1.25.

so, we will accept the null hypothesis.

Hence, no, this is not necessarily evidence that the proportion of Americans who are afraid to fly has increased.

3 0
3 years ago
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