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3 years ago

2 • (3 • 7) and (2 • 3) • 7 = ?

Mathematics

2 answers:

shusha [124]3 years ago

8 0

Answer:

First one is 42 and the second one is 48.

Step-by-step explanation:

Start with parentheses. I'll use the first one as an example. 3 x 7 is 21. Now that the parentheses are done, multiply it by whatever's left. 21 x 2, that's 42. For the other one, 2 x 3 is 6, x 7, is 48. Have a good day :)

Anton [14]3 years ago

6 0

Answer:

the first one is 42 because you do 3x7 and then multiply it by 2

3 x 7 = 21 21 x 2 =42

Step-by-step explanation:

the second one is 42 as well because 2x3 and multiply that by 7

2 x 3 = 6 6 x 7 = 42

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Write an equation of the line that passes through the given points.

Ratling [72]

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3 years ago

Consider triangle WXY. Triangle W X Y is shown. The length of side W X is 5, the length of side X Y is 10, and the length of sid

leonid [27]

Answer:

Angle W is greater than angle Y

Step-by-step explanation:

The angles in the triangles when solved are given as follows;

∠Y = 14.57

∠X = 135.23

∠W = 30.2

Angle W is greater than angle Y

This is Correct

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Angle X is smaller than angle W

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3 years ago

Read 2 more answers

Use the Law of Cosines to find the values of x and y. (PLEASE HELPPP!!!!)

vredina [299]

Answer:

$x = 49.8^\circ\\y = 54.6^\circ$

Step-by-step explanation:

Kindly refer to the image attached in the answer region for labeling of triangle.

AB = 16

BC = 19

AC = 15

$\angle ABC = x^\circ\\\angle ACB = y^\circ$

We have to find the angles x and y i.e. $\angle B \text{ and }\angle C$ .

Formula for cosine rule:

$cos B = \dfrac{a^{2}+c^{2}-b^{2}}{2ac}$

Where

a is the side opposite to $\angle A$ ,

b is the side opposite to $\angle B$ and

c is the side opposite to $\angle C$ .

$\Rightarrow cos x = \dfrac{19^{2}+16^{2}-15^{2}}{2 \times 19 \times 16}\\\Rightarrow cos x = \dfrac{392}{608} \\\Rightarrow x = 49.8^\circ$

Similarly, for finding the value of y:

$cos C = \dfrac{a^{2}+b^{2}-c^{2}}{2ab}\\\Rightarrow cos y = \dfrac{19^{2}+15^{2}-16^{2}}{2 \times 19 \times 15}\\\Rightarrow cos y = \dfrac{330}{570}\\\Rightarrow y = 54.6^\circ$