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NISA [10]
3 years ago
14

Please answer correctly !!!!!!!!!!!!!!!!!! Will mark brainliest !!!!!!!!!!!!!!!!!!!!

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

Answer:

180-x^{2}

Step-by-step explanation:

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3/8x - 1/4 =1/2<br><br> Please hurry
4vir4ik [10]

Answer:

x=2

Step-by-step explanation:

hope this helps :)

7 0
3 years ago
A toy manufacturer wants to know how many new toys children buy each year. A sample of 1492 children was taken to study their pu
julia-pushkina [17]

By assuming the standard deviation of population 2.2 the confidence interval is 8.67 toys,8.94 toys.

Given sample size of 1492 children,99% confidence interval , sample mean of 8.8, population standard deviation=2.2.

This type of problems can be solved through z test and in z test we have to first find the z score and then p value from normal distribution table.

First we have to find the value of α which can be calculated as  under:

α=(1-0.99)/2=0.005

p=1-0.005=0.995

corresponding z value will be 2.575 for p=0.995 .

Margin of error=z*x/d

where x is mean and d is standard deviation.

M=2.575*2.2/\sqrt{1492}

=0.14

So the lower value will be x-M

=8.8-0.14

=8.66

=8.67 ( after rounding)

The upper value will be x+M

=8.8+0.14

=8.94

Hence the confidence interval will be 8.67 toys and 8.94 toys.

Learn more about z test at brainly.com/question/14453510

#SPJ4

8 0
2 years ago
Find the mean, median, mode and range of the given data set. 12, 15, 17, 9, 17 a. 14, 15, 17, 8 c. 7, 14, 15, 17 b. 14, 12, 17,
Alex

Answer:

a. 14, 15, 17, 8

Step-by-step explanation:

5 0
3 years ago
A person walks 1 mile every day for exercise, leaving her front porch at 9:00 am and returning to her front porch at 9:25 am. wh
shusha [124]
The answer would be 0
4 0
3 years ago
Hi can you help me Find h?<br> Find h
AlekseyPX

Answer:

6

Step-by-step explanation:

3 0
2 years ago
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