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Ivanshal [37]
3 years ago
15

X

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.

<em>AB </em><em>= 16 </em>

<em>BC </em><em>= 19</em>

<em>AC </em><em>= 15 </em>

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

We have to find the <em>angles </em><em>x</em> and <em>y</em> i.e. \angle B \text{ and }\angle C.

Formula for <em>cosine rule</em>:

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

Where  

<em>a</em> is the side opposite to \angle A,

<em>b</em> is the side opposite to \angle B  and

<em>c</em> 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 <em>y:</em>

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
Read 2 more answers
-22<br> 52<br> -33<br> 71<br> -44<br> What is the x-intercept of the line?
swat32

Answer:

30

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.

5 0
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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