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3 years ago

Who can help me out

Mathematics

2 answers:

Mumz [18]3 years ago

3 0

the answer is (11,5) i drew it out on a coordinate plain so trust me

ElenaW [278]3 years ago

3 0

the answer is (11,5) i drew it out on a coordinate plain so trust me

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Is 3.275 rational number

Vladimir79 [104]

Answer:

yes it is rational number examples

3.275/5

3.275/10

hope.it helps

plz mark a brainliest

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3 years ago

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Which expression has a coefficient of 7?

____ [38]

Answer: I think its 12(4+x7) don’t trust me though

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3 years ago

Which is the best estimate of the sum of

Mazyrski [523]

Answer:

the fist one is wrong its c

Step-by-step explanation:

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3 years ago

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Solve the equation sin x + cos x=cos 2x for 0 27. x

vodka [1.7K]

Answer:

$x=\frac{\pi}{4}$ and $x=-\frac{3\pi}{4}$

Step-by-step explanation:

We are given that sin x+cos x=cos 2x

We have to solve the given equation for $0\leq x\leq 2\pi$

$sin x+cos x=cos^2x-sin^2x$

Because $cos 2x=cos^2-sin^2$

$sinx+cos x=(sinx +cos x)(sinx-cos x)$

$1 =sin x-cos x$

$sin x=cos x$

$\frac{sinx }{cos x}=1$

$tan x=1$

$tan x=\frac{sinx}{cos x}$

$tan x=tan\frac{\pi}{4}$

$x=\frac{\pi}{4}$

Tan x is positive in I and III quadrant

In III quadrant angle $\theta$ replace by $\theta -\pi$

Therefore, $tan x=tan (\frac{\pi}{4}-\pi)=tan\frac{\pi-4\pi}{4}=tan\frac{-3\pi}{4}$

$x=-\frac{3\pi}{4}$

8 0

2 years ago

What would happen to the buying power of your investment after one year if your rate of return was 3% and the rate of inflation

fredd [130]

Hello,

If the rate of return on an investment was 3% and the inflation rate was also 3%, then your buying power would remain the same. The two equal values would cancel each other out.

Imagine being given $300 and than having to pay $300, you are back where you started.

Good luck,
MrEQ

5 0

3 years ago