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Minchanka [31]
3 years ago
7

PLEASE HELP

Mathematics
1 answer:
katrin [286]3 years ago
3 0

Answer:

3 + 4n -9 + 5n

9n - 6

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3 0
2 years ago
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A cone and its dimensions are shown in the diagram . What is the volume of the cone in cubic inches? 7 1/2 in for height and 5 5
Gennadij [26K]

Answer:14.0625

Step-by-step explanation:volume of a Cone =1/3bh

1/3*71/2*5 5/8

15*15/16

14.0625

4 0
3 years ago
An isosceles right triangle has a leg that measures 6 in long. About how long is the hypotenuse?
Yuliya22 [10]

Answer: about 8.5


Step-by-step explanation:

1. a^2+b^2=c^2

2. 36+36=c^2

3.c=8.48528 rounds ro 8.5

4 0
3 years ago
Given a sample of 35, what is the sample standard deviation of a pair of jeans if the 90% confidence interval is [37.14, 42.86]
DENIUS [597]

Answer:

<h2>10.295</h2>

Step-by-step explanation:

Using the value for calculating the confidence interval as given;

CI = xbar + Z*σ/√n

xbar  is the mean = 37.14+42.86/2

xbar= 80/2

xbar = 40

Z is the z-score at the 90% confidence = 1.645

σ is the standard deviation

n is the sample size = 35

Given the confidence interval CI as [37.14, 42.86]

Using  the maximum value of the confidence interval to get the value of the standard deviation, we will have;

42.86 =  xbar + Z*σ/√n

42.86 = 40 + 1.645* σ/√35

42.86-40 = 1.645*σ/√35

2.86 = 1.645*σ/√35

2.86/1.645 = σ/√35

1.739 = σ/√35

1.739 = σ/5.92

σ= 1.739*5.92

σ = 10.295

Hence, the sample standard deviation of a pair of jeans is 10.295

7 0
2 years ago
PLEASE HELP SOON<br><br> What is the value of x?<br><br> Enter your answer in the box.<br><br> x =
Artist 52 [7]

Answer:

x =39°

the total interior angles of a triangle is 180°

let the unknown angle be x,

solve:

x + 39 + 102 = 180°

x = 180° -  39° - 102°

x = 39°

Therefore the unknown angle is 39°

6 0
1 year ago
Read 2 more answers
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