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3 years ago

PLEASE HELP ME I WILL GIVE 20 POINTS PLEASEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE I forgot how to do this stuff

Mathematics

2 answers:

VikaD [51]3 years ago

6 0

Answer:

Step-by-step explanation:

Angles on a straight line sum to 180

65+35=100

180-100=80

angle r=80

Mice21 [21]3 years ago

3 0

Answer:

80 degrees.

Step-by-step explanation:

I know a straight line is 180 degrees so I added up 65 and 35 then subtracted that number (100) from 180 (straight line) and I got my answer.

Please make me brainliest!!!!!!!!

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9^a-5 = 12<br><br> pls answer

xenn [34]

Answer:

a=1.29 approx

Step-by-step explanation:

5 0

3 years ago

Solve the given initial-value problem. the de is of the form dy dx = f(ax + by + c), which is given in (5) of section 2.5. dy dx

shutvik [7]

$\dfrac{\mathrm dy}{\mathrm dx}=\cos(x+y)$

Let $v=x+y$ , so that $\dfrac{\mathrm dv}{\mathrm dx}-1=\dfrac{\mathrm dy}{\mathrm dx}$ :

$\dfrac{\mathrm dv}{\mathrm dx}=\cos v+1$

Now the ODE is separable, and we have

$\dfrac{\mathrm dv}{1+\cos v}=\mathrm dx$

Integrating both sides gives

$\displaystyle\int\frac{\mathrm dv}{1+\cos v}=\int\mathrm dx$

For the integral on the left, rewrite the integrand as

$\dfrac1{1+\cos v}\cdot\dfrac{1-\cos v}{1-\cos v}=\dfrac{1-\cos v}{1-\cos^2v}=\csc^2v-\csc v\cot v$

Then

$\displaystyle\int\frac{\mathrm dv}{1+\cos v}=-\cot v+\csc v+C$

and so

$\csc v-\cot v=x+C$

$\csc(x+y)-\cot(x+y)=x+C$

Given that $y(0)=\dfrac\pi2$ , we find

$\csc\left(0+\dfrac\pi2\right)-\cot\left(0+\dfrac\pi2\right)=0+C\implies C=1$

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5 0

3 years ago

Pls help! will give brainlist!

Vika [28.1K]

Answer:

A. 60°

Step-by-step explanation:

There's a very straight-forward explanation for this, thank god! XD

For this type of problem, there's a rule to follow for the outside angle. X and 120 should equal 180, so all you need to do is fill that gap.

180-120 = 60

60 is your answer because it completes the whole angle.

4 0

3 years ago

Helpppp meee plsssss

Sholpan [36]

Answer:

Step-by-step explanation:

1/6x+ 4/6x = -4/6

5/6x= -4/6

x=( -4/6)/ (-5/6)

x= 4/5

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2 years ago

What is the probability of rolling an even number when rolling a 6-sided die?

lukranit [14]

Answer:

B.1/2

Step-by-step explanation:

Half of the numbers on a dice are even, so you have a 1 half probability of landing on an even number

7 0

3 years ago