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4 years ago

What is s the mean of this set of data 1,5,8,10,11,4,8,9

Mathematics

2 answers:

Anna [14]4 years ago

4 0

The mean is 7.......

ANTONII [103]4 years ago

3 0

The answer is 7 because if you add them all up you get 56 then you divide it by 8 and you get 7

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which could be the coordinates of the vertices of the following parallelogram, given that s is a units from the origin, z is b u

andrew11 [14]

The coordinates of the vertices of the parallelogram, given that s is a units from the origin, Z is b units from the origin, and then length of the base is c units could be the following:

W(b+c, 0), Z(b, 0), S(0, a), T(c,a)

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3 years ago

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Millions of years ago, the Indian plate began pushing gradually towards the Eurasian plate. The land above started rising in var

deff fn [24]

Folded mountain with waves, twists, and turns. I believe because the article stated it was gradual and various patterns were formed.

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3 years ago

4 is what percent of 550

vladimir2022 [97]

If you want to evaluate what percent of 550 is 4, you can do this in two following steps.
First, you have to write it as a fraction: 4/550.
Second, you have to transform this fraction to percent: (4/550)*100%.

(4/550)*100% = 0.0072727272727273*100% = 0.727%

The correct result is 0.727%.

6 0

3 years ago

Point j (-8 -12) is reflected over the x axis where is j

stiv31 [10]

Answer:

J(0,2)

Step-by-step explanation:

When you reflect a point across the x-axis, the x-coordinate remains the same, but the y-coordinate is transformed into its opposite (its sign is changed). If you forget the rules for reflections when graphing, simply fold your paper along the x-axis (the line of reflection) to see where the new figure will be located.

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3 years ago

Using what you know about right triangle trigonometry, salt the triangle round the side to the nearest 10th and angle measures t

Elden [556K]

Answer:

Angle A = 49° Angle B = 41° Side AB = 30.5

Step-by-step explanation:

Let's work out Angle A and Angle B first. We are given AC and CB, therefore AB must be the hypotenuse as it is the longest side.

AC and CB must be the opposite and adjacent sides, therefore we can use tan(x) = Opposite/Adjacent for working out both Angle A and Angle B.

Angle A:

tan(A) = 23/20 For Angle A, CB (23) is the side opposite the angle and AC (20) is the side in between Angle A and the right angle, also the adjacent side.

A = $tan^{-1}(\frac{23}{20})$ We do the inverse of tan here.

A = 48.9909131

A = 49° Rounding to the nearest degree simply means to the nearest whole number.

Angle B:

tan(B) = 20/23 For Angle B, AC (20) is the side opposite the angle and CB (23) is the side in between Angle B and the right angle, also the adjacent side.

B = $tan^{-1}(\frac{20}{23})$

B = 41.0090869

B = 41°

Side AB:

We can just use Pythagoras' Theorem here to work out AB, but I will also use trigonometry to show you how you can use both formulas. When I use trigonometry, I will only be using Angle A as an example.

Pythagoras' Theorem: $a^{2} + b^{2} = c^{2}$

AC = 20 = a

CB = 23 = b

$20^{2} + 23^{2} = c^{2}$

929 = $c^{2}$

c = $\sqrt{929}$

c = 30.47950131

c = 30.5 Rounding to the nearest 10th simply means rounding to 1 decimal place.

Trigonometry: SOHCAHTOA

Angle A = 49°

AC = 20 I will use AC as our adjacent side instead of CB. They will both give us the same answer anyways.

AB will always be the hypotenuse in the given right-angled triangle.

cos(x) = Adjacent/Hypotenuse

cos(49) = 20/AB

ABcos(49) = 20 Here we multiply by AB, our hypotenuse.

AB = 20/cos(49) Now we divide by cos(49)

AB = 30.48506173 As you can see here, this answer is different from the Pythagoras' Theorem one because we rounded our angle values, meaning out angle values aren't exact! Instead, use Pythagoras' Theorem here for more accurate results instead of Trigonometry.

AB = 30.5 They still give us the same answer in the end!

I hope this helps you!! ^-^

7 0

3 years ago