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Effectus [21]
3 years ago
13

Evaluate the expression when a = 2 and b = 5.(4a−b)2+3a12152480

Mathematics
1 answer:
serg [7]3 years ago
3 0

Step-by-step explanation:

sry I just wanted the points I'm in middle school so I don't know this stuff either

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An opinion poll asks a simple random sample of 100 college seniors how they view their job prospects. In all, 53 say "good." Doe
ValentinkaMS [17]

Answer:

We are tryng to proof if more than half of all seniors think their job prospects are good so that would be the alternative hypothesis and the complement rule would be the null hypothesis.:  

Null hypothesis:p\leq 0.5  

Alternative hypothesis:p > 0.5  

Step-by-step explanation:

Information provided

n=100 represent the random sample ofcollege senior selected

X=53 represent the college seniors who say good

\hat p=\frac{53}{100}=0.53 estimated proportion of seniors who think their job prospects are good

p_o=0.5 is the value that we want to test

z would represent the statistic

p_v represent the p value

System of hypothesis

We are tryng to proof if more than half of all seniors think their job prospects are good so that would be the alternative hypothesis and the complement rule would be the null hypothesis.:  

Null hypothesis:p\leq 0.5  

Alternative hypothesis:p > 0.5  

The statistic is given by:

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

Replacing the info given we have:

z=\frac{0.53 -0.5}{\sqrt{\frac{0.5(1-0.5)}{100}}}=0.6  

The p value for this case would be given by

p_v =P(z>0.6)=0.274  

7 0
4 years ago
Which relation has a domain of {3, 5, 8} ?
faltersainse [42]
The third answer has a domain of 3,5,8
6 0
3 years ago
<img src="https://tex.z-dn.net/?f=%5Chuge%5Cboxed%7BWrite%5C%3Bequations%5C%3Bfor%5C%3Bthe%5C%3Bfollowing...%7D%5C%5C%5C%5C1...%
antiseptic1488 [7]

Answer:

1. y = -2/3x + 2

2. y = 2/4x + -3

3. y = 1x -1

6 0
4 years ago
Read 2 more answers
Find the volume of the 3-D solid shown below:
KonstantinChe [14]

Check the picture below.

so is really just a thick trapezoid, or namely a trapezoidal prism 5 inches thick.

so if we just get the area of the trapezoidal face and multiply by the thickness, we'd get it's volume

\bf \textit{area of a trapezoid}\\\\ A=\cfrac{h(a+b)}{2}~~ \begin{cases} a,b=\stackrel{parallel~sides}{bases}\\ h=height\\[-0.5em] \hrulefill\\ a = 8\\ b = 13\\ h = 6 \end{cases}\implies A=\cfrac{6(8+13)}{2}\implies A=63 \\\\\\ \stackrel{\textit{area of the trapezoidal prism}}{63\cdot 5\implies \stackrel{in^3}{315}}

5 0
3 years ago
Can I get help please
WITCHER [35]

Answer:

sorry you cant get help but you can help me!

GO TO MY PAGE

Step-by-step explanation:

8 0
3 years ago
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