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3 years ago

9

HELP HELP HELP HELP HELP

2 answers:

Alexandra [31]3 years ago

8 0

All real number except 1.

For x=1 denominator = 0 & the function is not defined

irina1246 [14]3 years ago

6 0

All real numbers except 1 since you cant have 0 on the bottom

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Miranda has 4 lb 6 oz of clay is she divided it into 10 equal parts how heavy is each part?

natulia [17]

Each part would be 20z of Clay

8 0

3 years ago

What are the x and y intercepts of the line??<br><br> 5x-2y=-20

uysha [10]

X=(-4,0)
y=(0,9)
hope this helps

8 0

3 years ago

Read 2 more answers

Save me the headache

maxonik [38]

$(9\sin2x+9\cos2x)^2=81$

Taking the square root of both sides gives two possible cases,

$9\sin2x+9\cos2x=9\implies\sin2x+\cos2x=1$

or

$9\sin2x+9\cos2x=-9\implies\sin2x+\cos2x=-1$

Recall that

$\sin(\alpha\pm\beta)=\sin\alpha\cos\beta\pm\cos\alpha\sin\beta$

If $\alpha=2x$ and $\beta=\dfrac\pi4$ , we have

$\sin\left(2x+\dfrac\pi4\right)=\dfrac{\sin2x+\cos2x}{\sqrt2}$

so in the equations above, we can write

$\sin2x+\cos2x=\sqrt2\sin\left(2x+\dfrac\pi4\right)=\pm1$

Then in the first case,

$\sqrt2\sin\left(2x+\dfrac\pi4\right)=1\implies\sin\left(2x+\dfrac\pi4\right)=\dfrac1{\sqrt2}$

$\implies2x+\dfrac\pi4=\dfrac\pi4+2n\pi\text{ or }\dfrac{3\pi}4+2n\pi$

(where $n$ is any integer)

$\implies2x=2n\pi\text{ or }\dfrac\pi2+2n\pi$

$\implies x=n\pi\text{ or }\dfrac\pi4+n\pi$

and in the second,

$\sqrt2\sin\left(2x+\dfrac\pi4\right)=-1\implies\sin\left(2x+\dfrac\pi4\right)=-\dfrac1{\sqrt2}$

$\implies2x+\dfrac\pi4=-\dfrac\pi4+2n\pi\text{ or }-\dfrac{3\pi}4+2n\pi$

$\implies2x=-\dfrac\pi2+2n\pi\text{ or }-\pi+2n\pi$

$\implies x=-\dfrac\pi4+n\pi\text{ or }-\dfrac\pi2+n\pi$

Then the solutions that fall in the interval $[0,2\pi)$ are

$x=0,\dfrac\pi4,\dfrac\pi2,\dfrac{3\pi}4,\pi,\dfrac{5\pi}4,\dfrac{3\pi}2,\dfrac{7\pi}4$

5 0

3 years ago

Read 2 more answers

Please help, we only have about a few minutes left.

mash [69]

I think she ate 1/2 i think

3 0

3 years ago

What is the slope of the line?

Umnica [9.8K]

Answer:

$\frac{2}{1}$

Step-by-step explanation:

Hello!

To find the slope of a line we divide how many times it goes over by the number of times it goes up

The line goes over 4 and up 2 which is shown like

$\frac{4}{2}$

We can simplify this

$\frac{2}{1}$

The answer is $\frac{2}{1}$

Hope this helps!

7 0

3 years ago

Read 2 more answers