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3 years ago

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 y=6x+12 solve by substitution

Mamont248 [21]

Answer:

(-2,0) x=-2 y=0

Step-by-step explanation:

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

Hope this helps!

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:

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

differentiating numerator wrt x :-

(sinx)' = cos x

differentiating denominator wrt x :- 

(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 What is the value of x? A. 42° B. 48 C. 64° D. 84

valkas [14]

Answer:

Step-by-step explanation:

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

*Every triangle is 180 degrees

(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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