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JulijaS [17]
3 years ago
11

PLEASE HELP WILL GIVE BRAINLIEST!!

Mathematics
1 answer:
NemiM [27]3 years ago
7 0

Answer:

p<7

Step-by-step explanation:

$5 per pound

7 pounds equals $35

$5p<$35

p<35/5

p<7

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1) A school has 1600 students and they are going to vote as to whether they will completely convert the school completely off fo
fredd [130]

Answer:

Standard deviation of the students = 0.408

The students would you have to poll to be 95% confident of the outcome within /- 2% of the vote  

         = 0.408 X 1600

         = 652.8    

Step-by-step explanation:  

<u><em>Step(i):</em></u>-

Given sample size 'n' = 1600

95% confidence interval of the margin error is determined by

                      M.E = \frac{Z_{0.05} S.D}{\sqrt{n} }

Level of significance = 0.05

Z₀.₀₅ = 1.96

Given Margin of error = 2% = 0.02

       M.E = \frac{Z_{0.05} S.D}{\sqrt{n} }

       0.02 = \frac{1.96 X S.D}{\sqrt{1600} }

      0.02 X √1600 = 1.96 X S.D

       S.D = \frac{0.02X\sqrt{1600} }{1.96} = 0.408

Standard deviation of the students = 0.408

The students would you have to poll to be 95% confident of the outcome within /- 2% of the vote  

         = 0.408 X 1600

         = 652.8  

5 0
2 years ago
Factor completely 3bx^2 - 9x^3 - b + 3x​
Anna11 [10]

Factor out the common terms in the first two terms, then in the last two terms;

3x^2(b - 3x) - (b - 3x)

Factor out the common term b - 3x

<u>= (b - 3x)(3x^2 - 1)</u>

5 0
3 years ago
Um can y’all help me :)) plsss
Phantasy [73]

Answer:

(0+3,1) (3+3,0) (3+3x4)

5 0
2 years ago
PLEASE PLEASE HELP ME WITH THIS QUESTION
4vir4ik [10]

Step-by-step explanation:

It's a proportion.

Here is your process:

15*4=60

60/20=3

3=y

:)

5 0
3 years ago
Read 2 more answers
Keith has 39 books in his library he brought several books at a yard sale over the weekend he now has 84 in his library how many
garri49 [273]

Subtract original amount from new amount:

84 - 39 = 45

He bought 45 books.

3 0
3 years ago
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