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ohaa [14]
3 years ago
8

Hello. Ik im going to get a warning for this and it will get reported but, I DO have a question. Do u think my math teacher will

get susspisous if i get all three test 100% bc i been using brainly? Also math is my WORST subject but i still get A's in it.
wut'da think?? Should i learn the real math or wut. i think i should learn the real math tho.....
Mathematics
1 answer:
Ilia_Sergeevich [38]3 years ago
3 0

He probably won't get too suspicious if you get 100% on three quizzes when you regularly get A's in that class.  A ninety-something percent jump to a 100 is less than a 10-point increase.  

That being said, it's still best to learn the math so that you don't become dependent on using Brainly for every question.  Maybe only use it when you're having a lot of trouble with a particular problem or concept; but some of the explanations on here are actually really helpful in teaching things.

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Under a counterclockwise rotation about the origin of 90°

a point (x , y ) → (- y, x ), hence

A(2, 1 ) → A'(- 1, 2 )


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3 years ago
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To solve the equation 5sin(2x)=3cosx, you should rewrite it as___.​
galina1969 [7]

Answer:

A

Step-by-step explanation:

We want to solve the equation:

5\sin(2x)=3\cos(x)

To do so, we can rewrite the equation.

Recall the double-angle for sine:

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By substitution:

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We can subtract 3cos(x) from both sides:

10\sin(x)\cos(x)-3\cos(x)=0

And factor:

\cos(x)\left(10\sin(x)-3\right)=0

Hence, our answer is A.

*It is important to note that we should not divide both sides by cos(x) to acquire 10sin(x) = 3. This is because we need to find the values of x, and one or more may result in cos(x) = 0, and we cannot divide by 0. Hence, we should subtract and then factor.

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2 years ago
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6 0
2 years ago
When I solved this equation I got x=0.5
qwelly [4]

You might have made an error the first time you solved for x. I got x = -0.5.

When you have your log base 4, the way you cancel that out is by making 4 the base on both sides, so you get 4^(log4) to reduce to 1, and you're left with:

2x + 3 = 4^(1/2) ... Simplify

2x + 3 = 2

2x = -1

x = -1/2

If you plug that back in, everything checks out. Maybe double check your use of logarithm/exponent properties?

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3 years ago
Which of the following distances is the longest?
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2,300 meters is the answer to your question.
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