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3 years ago

A triangle has side length 3,8 and 9. Find the angle measurement for the angle cross from the side with length of 8.

Mathematics

1 answer:

zheka24 [161]3 years ago

4 0

Answer:

The angle measurement is 61.218°

Step-by-step explanation:

I used a triangle calculator

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How many centigram are equal to 9.95 milligram

mr Goodwill [35]

Answer:

0.995 centigram

Step-by-step explanation:

divide the mass value by 10

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2 years ago

1. I mark as brainliest

ludmilkaskok [199]

Answer:

Step-by-step explanation:

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3 years ago

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Joshua has math and reading homework tonight. Joshua can solve each math problem in 2.5 minutes and he can read each page in 3 m

liraira [26]

Answer:

Joshua solved 7 math problems and tread 14 pages.

Step-by-step explanation:

Let x be the number of math problems Joshua solved. The number of pages Joshua read is twice the number of math problems he solved, then 2x is the number of pages Joshua read.

Joshua can solve each math problem in 2.5 minutes, then x math problems he solves in 2.5x minutes.

Joshua can read each page in 3 minutes, then 2x pages he reads in $3\cdot 2x=6x$ minutes.

It took him 59.5 minutes to complete all of his homework, so

$2.5x+6x=59.5$

Solve this equation:

$2.5x+6x=59.5\\ \\8.5x=59.5\\ \\85x=595\\ \\x=7\\ \\2x=14$

Joshua solved 7 math problems and tread 14 pages.

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3 years ago

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If the perimeter of an equilateral triangle is 6√3, find its area

Natalka [10]

Answer:

3√3

Step-by-step explanation:

Side of an equilateral triangle: perimeter/3 = 2√3

Area of an equilateral triangle: side * side * √3 / 4 = 3√3

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3 years ago

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A school psychologist notes that the average number of times that students are disruptive during class is 1.4 [μ=1.4] times per

marta [7]

Answer:

Reject the Null ;

0.928

Step-by-step explanation:

Given the data: 2, 4, 3, 5, 1, 1, 4

Sample mean = (2 + 4 + 3 + 5 + 1 + 1 + 4) / 7 = 2.857

Standard deviation, s = 1.57 ( using calculator)

The hypothesis :

H0 : μ = 1.4

H1 : μ ≠ 1.4

Since sample size is small, use T test

Test statistic :

Tstatistic = (x - μ) / s/sqrt(n)

Tstatistic = (2.857 - 1.4) / 1.57/sqrt(7)

Tstatistic = 1.457 / 0.593 = 2.455

Two tailed test at α = 0.05

Tcritical at df = 7-1 = 6 ; α = 0.05 = 2.447

Tstatistic > Tcritical ; reject the null

Since ;

2.455 > 2.447 ; we reject the null ;

There is significam evidence that Number of complaints has changed.

Effect size ;

d = (x - μ) / s

d = (2.857 - 1.4) / 1.57

d = 1.457 / 1.57

d = 0.928

5 0

3 years ago