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Mkey [24]
3 years ago
14

The total number of students in the seventh grade is 9 more than 4 times as many students as are in the art class. there are 101

student in the seventh grade write and solve a equation to find the number of stupidest in the art class l. let x represent the number of stupids in the art class
Mathematics
1 answer:
Wewaii [24]3 years ago
6 0
I'm assuming you mean students when you write stupids. 

Give that x = students, the number of total students is equal to 9 more than 4 times x or: 

4x + 9

Set that equal to 101 and solve. 

The answer is 23
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2 years ago
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Chicken Delight claims that 87% of its orders are delivered within 10 minutes of the time the order is placed. A sample of 80 or
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Answer:

There is strong evidence that less than 87% of the orders are delivered in less than 10 minutes.

Decision rule: Reject the null hypothesis if (P-value < level of significance)

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Step-by-step explanation:

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The significance level is assumed to be 0.01.

The sample of size n=80 gives a proportion of p=61/80=0.7625.

The standard deviation is:

\sigma=\sqrt{\frac{\pi(1-\pi)}{N} }=\sqrt{\frac{0.87*0.13}{80} }=0.0376

The statistic z is then

z=\frac{p-\pi+0.5/N}{\sigma}=\frac{0.7625-0.87+0.5/80}{0.0376} } =\frac{-10125}{0.0376} =-2.70

The P-value is

P(z

The P-value (0.003) is smaller than the significance level (0.010), so the effect is significant. The null hypothesis is rejected.

There is strong evidence that less than 87% of the orders are delivered in less than 10 minutes.

Decision rule: Reject the null hypothesis if (P-value < level of significance)

Test statistic z=-2.70

Decision: Reject the null hypothesis (0.003<0.010)

6 0
3 years ago
PLZ HELP OMG!! I’ll mark Brainliest to whoever gives correct answer first!!!
azamat

Answer:

Step-by-step explanatioThe chosen topic is not meant for use with this type of problem. Try the examples below.

2

(

x

2

−

1

)

=

16

,  

(

0

,

4

)

 

8

=

2

(

3

x

+

3

)

2

,  

(

−

1

,

3

)

x

(

x

+

4

)

=

24

,  

(

−

2

,

9

)

n:

3 0
3 years ago
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