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tino4ka555 [31]
3 years ago
15

I need help on this and then I have to turn it by tomorrow

Mathematics
1 answer:
Yuri [45]3 years ago
7 0
To blurry if you need help just contact me
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Y= -5x-10<br> y=6x+12<br><br> solve by substitution
Mamont248 [21]

Answer:

<em>(-2,0) x=-2  y=0 </em>

Step-by-step explanation:

<u>Solve for the first variable in one of the equations, then substitute the result into the other equation</u>

<u>Hope this helps!</u>

4 0
3 years ago
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Find dy/dx given that y = sin x / 1 + cos x​
kobusy [5.1K]

Answer:

\frac{1}{1 +  \cos(x) }

Step-by-step explanation:

y =  \frac{ \sin(x) }{1 +  \cos(x) }

<u>differentiating numerator wrt x :-</u>

(sinx)' = cos x

<u>differentiating denominator wrt x :- </u>

(1 + cos x)' = (cosx)' = - sinx

  • Let's say the denominator was "v" and the numerator was "u"

(\frac{u}{v}  )'  =  \frac{v. \: (u)'  - u.(v)' }{ {v}^{2} }

here,

  • since u is the numerator u= sinx and u = cos x
  • v(denominator) = 1 + cos x; v' = - sinx

=  \frac{((1 +  \cos \: x) \cos \: x )- (\sin \: x. ( -  \sin \: x)  ) }{( {1 +  \cos(x)) }^{2} }

=  \frac{ \cos(x)  +  \cos {}^{2} (x)  +   \sin {}^{2} (x) }{(1 +  \cos \: x) {}^{2}  }

since cos²x + sin²x = 1

=  \frac{ \cos \: x + 1}{(1 +  \cos \: x) {}^{2}  }

diving numerator and denominator by 1 + cos x

=  \frac{1}{1 +  \cos(x) }

6 0
3 years ago
WILL MARK BRANLIESTTT<br> What is the value of x?<br> A. 42°<br> B. 48<br> C. 64°<br> D. 84
valkas [14]

Answer:

<h2>D.84</h2>

Step-by-step explanation:

<u>*It's an isosceles triangle so 2 of the angles are going to be the same degrees</u>

<u>*Every triangle is 180 degrees</u>

(48)+(48)=96 then 180-96=84

8 0
3 years ago
You earn $48 for washing 6 cars. How much money do you earn for washing 3 cars
Ghella [55]

Answer: $24

Step-by-step explanation: 3 is half of 6 and if you gain $48 for washing 6 cars then half it half of 6 is 3 and half of $48 is $24

4 0
3 years ago
Add the expression. Write the sum in simplest form 3 /x+2 + x+1 / x^2 + 5x + 6
Over [174]

Answer: ?

Step-by-step explanation:

7 0
3 years ago
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