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Or simply cancel the 7's:

$$-\frac{7}{8}*\frac{1}{7}=-\frac{1}{8}*\frac{1}{1}=-\frac{1}{8}=-0.125$$

0⁰ is undefined.  

There are 1000 milliWatts (mW) in one Watt (W) so multiply your number by 1000.

$${\frac{{\mathtt{5}}}{{\mathtt{6}}}}{\mathtt{\,\times\,}}{\mathtt{10}} = {\frac{{\mathtt{25}}}{{\mathtt{3}}}} = {\mathtt{8.333\: \!333\: \!333\: \!333\: \!333\: \!3}}$$

   1957-(1957*.8)=1957/5=391.4

$${{\mathtt{\,-\,}}\left({\frac{{\mathtt{5}}}{{\mathtt{2}}}}\right)}^{{\mathtt{3}}} = {\mathtt{\,-\,}}{\frac{{\mathtt{125}}}{{\mathtt{8}}}} = -{\mathtt{15.625}}$$

$${\mathtt{499.99}}{\mathtt{\,\times\,}}{\mathtt{0.2}} = {\mathtt{99.998}}$$ = 20% of 499.99 ∴

$${\frac{{\mathtt{499.99}}}{{\mathtt{99.998}}}} = {\mathtt{5}}$$

(-5/9)k=2

k=2/(-5/9)

k=2 x  -9/5

k=-18/5

$${\mathtt{2}}{\mathtt{\,\times\,}}{{\mathtt{x}}}^{{\mathtt{2}}}{\mathtt{\,-\,}}{\mathtt{4}}{\mathtt{\,\times\,}}{\mathtt{x}}{\mathtt{\,\small\textbf+\,}}{\mathtt{1}} = {\mathtt{0}} \Rightarrow \left\{ \begin{array}{l}{\mathtt{x}} = {\mathtt{\,-\,}}{\frac{\left({\sqrt{{\mathtt{2}}}}{\mathtt{\,-\,}}{\mathtt{2}}\right)}{{\mathtt{2}}}}\\
{\mathtt{x}} = {\frac{\left({\sqrt{{\mathtt{2}}}}{\mathtt{\,\small\textbf+\,}}{\mathtt{2}}\right)}{{\mathtt{2}}}}\\
\end{array} \right\} \Rightarrow \left\{ \begin{array}{l}{\mathtt{x}} = {\mathtt{0.292\: \!893\: \!218\: \!813\: \!452\: \!5}}\\
{\mathtt{x}} = {\mathtt{1.707\: \!106\: \!781\: \!186\: \!547\: \!5}}\\
\end{array} \right\}$$

Sorry the answer equals 8. I acedently pushed the wrong key

well the squrt of 2/2 = 1 so 1x8= 8 so assuming the question you asked is 8 times the square root or 2/2 the answer is 1

I put it in my graphic calculator and got 461/250

-.125 

-7/8= -.875

1/7=.1428571429...

-.875x.1428571429...=-.125

Is this a math question?

i think they are put here to test our faith. i believe in a single god, i believe that he does everything for a reason. i dont honestly know if there is a real answer to this question. this is something you will figure out as you go throught life.

$14=1400 cents

1400 divided by 100 is 14

14 multiplied by 13 is 182

tax is 182 cents

182+1400=1582

1582 cents is equal to $15.82

so the total price is $15.82

multiply your number by 1000

This is profound! Did you come up with this answer or did god give it to you?

Nice, Alan !!!

Thumbs UP !!

Press 2nd then acos, or just type acos.  

Here's a graph (drawn to scale) to illustrate Chris's answer:

$$7\frac{5}{10}=7\frac{1}{2}$$

Two perpendicular chords with lengths 12.2 cm and 8.8 cm have a common endpoint.What is the area of the circle?

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If the chords are perpendicular, they form a right angle, and in a circle, an inscribed angle measures 1/2 of its intercepted arc. So, the arc it intercepts is a half-circle. Thus the remaining side of this right triangle (the hypoteneuse) is a diameter.

So (12.2² + 8.8²)^(1/2)  ≈ 15.04 cm   And half of this is the raius of the circle = 7.52

And the area of the circle is pi*(7.52)²  ≈ 177.66cm²

I am not sure what you mean by definition but if something is raised to a negative power than write it as a fraction, swap it to the other side of the fraction line and change the negative to a positive.

eg

$$6x^{-3}=\frac{6x^{-3}}{1}=\frac{6}{1\times x^{+3}}=\frac{6}{x^{3}}$$

Does that make sense? (Only the x was raised to a negative power so everthing else stayed in its original position.)

10736

$${\mathtt{7.5}} = {\frac{{\mathtt{15}}}{{\mathtt{2}}}}$$