2 years ago

PLEASE QUICK ILL GIVE BRAINLY

Mathematics

1 answer:

bonufazy [111]2 years ago

8 0

Answer:

x = 3

y = 91

Step-by-step explanation:

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Please help with my math i took a picture of it

Fynjy0 [20]

Answer:

40°

Step-by-step explanation:

Supplementary angles add up to 180°. Complementary angles add up to 90°.

m∠1 + m∠2 = 180°

115° + m∠2 = 180°

m∠2 = 65°

m∠2 + m∠3 = 90°

65° + m∠3 = 90°

m∠3 = 25°

m∠2 − m∠3 = 65° − 25° = 40°

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3 years ago

9.50 One way to evaluate the effectiveness of a teaching assistant is to examine the scores achieved by his or her students on a

EleoNora [17]

Answer:

Step-by-step explanation:

Given that a professor sets a standard examination at the end of each semester for all sections of a course. The variance of the scores on this test is typically very close to 300.

$H_0: s^2 = 300\\H_a: s^2 \neq 300$

(Two tailed test for variance )

Sample variance =480

We can use chi square test for testing of hypothesis

Test statistic = $\frac{(n-1)s^2}{\sigma^2} \\=62.4$

p value = 0.0100

Since p <0.05 our significance level, we reject H0.

The sample variance cannot be claimed as equal to 300.

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2 years ago

How many ways can four people (A, B, C, D) sit in a row at a move theater if C and D must sit next to each other?

Novay_Z [31]

Answer:

24 ways in four people.

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2 years ago

What is the equation for the line of reflection that maps the trapezoid onto itself?

kvv77 [185]

The line that maps a figure onto itself is a line of symmetry of the figure.

From the given trapezoid, the line of symmetry of the trapezoid is x = -2.

Therefore, the equation for the line of reflection that maps the trapezoid onto itself is x = -2.

6 0

3 years ago

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HELP PLEASE SHOW WORK WILL MARK BRAINLIEST

defon

I've attached a photo of the solution below. Hope it helps!

3 0

2 years ago