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3 years ago

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Mathematics

1 answer:

Serjik [45]3 years ago

4 0

Answer:

Step-by-step explanation:the first one is 8

Second 3 3- 6

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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:

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

Hence, the values are:

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

7 0

3 years ago

What is f(5) for the function f(x)=2x+7

denis-greek [22]

Answer:

Solution:

f(5)=2×5+7

=10+7

=17

8 0

3 years ago

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-22 52 -33 71 -44 What is the x-intercept of the line?

swat32

Answer:

Step-by-step explanation:

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3 years ago

Need help with math probelm if do 5 stars

DerKrebs [107]

D. 62 because if we separate the shape into two then one will be 5*4 and the other will be 7*6. Adding them up will equal the whole shape.

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2 years ago

Last year, there were 148 pies baked for the bake sale. This year, there were c pies baked. Using c, write an expression for the

solniwko [45]

$\huge{\boxed{c+148}}$

We need to find the number of pies baked in years 1 and 2.

There were 148 pies baked in year 1. $148$

There were $c$ pies baked in year 2. $148+c$

Rearrange the terms so the variable is first. $c+148$

5 0

3 years ago

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