Neither the decimal ".727272..." nor the decimal ".722222..." can be turned into a fraction.
Also to respond to CPhill's comment I'm pretty sure that he was saying that he needed the answer based on ".72 repeating" not what you assumed he meant. Also the answer you gave can be simplified to $${\frac{{\mathtt{18}}}{{\mathtt{25}}}}$$.

$$-i=$$   $$-{\mathtt{1}}{i}$$

My guess is $$-{\mathtt{1}}{i}$$.

Yay! You solved it by your own!

so far, this has been the best one!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Great job! Give yourself a point HaleyWoodball17!

Good answer, Haley  !!!

Answer is 1.... As -3 square is positive 9.... And 3 square is also 9.... And 9 divided by 9 is 1

$${\mathtt{69}}{\mathtt{\,\times\,}}{{\mathtt{x}}}^{{\mathtt{4}}}{\mathtt{\,-\,}}{\mathtt{2}}{\mathtt{\,\times\,}}{{\mathtt{x}}}^{{\mathtt{3}}}{\mathtt{\,\small\textbf+\,}}{\mathtt{62}}{\mathtt{\,\times\,}}{{\mathtt{x}}}^{{\mathtt{2}}}{\mathtt{\,-\,}}{\mathtt{2}}{\mathtt{\,\times\,}}{\mathtt{x}}{\mathtt{\,-\,}}{\mathtt{7}} = {\mathtt{0}} \Rightarrow \left\{ \begin{array}{l}{\mathtt{x}} = {\mathtt{\,-\,}}{\frac{{\mathtt{7}}}{{\mathtt{23}}}}\\
{\mathtt{x}} = {\frac{{\mathtt{1}}}{{\mathtt{3}}}}\\
{\mathtt{x}} = -{\mathtt{1}}{i}\\
{\mathtt{x}} = {i}\\
\end{array} \right\} \Rightarrow \left\{ \begin{array}{l}{\mathtt{x}} = -{\mathtt{0.304\: \!347\: \!826\: \!086\: \!956\: \!5}}\\
{\mathtt{x}} = {\mathtt{0.333\: \!333\: \!333\: \!333\: \!333\: \!3}}\\
{\mathtt{x}} = -{\mathtt{1}}{i}\\
{\mathtt{x}} = {i}\\
\end{array} \right\}$$

So, this polynomial has two "real" and two "non-real" roots  !!!

140% as a decimal is 1.40

No, C6H6 is hydrocarbon, and not sugar. Benzene has that chemical formula, in addition to "weard" and uncommon hydrocarbons such as the symmetrical and beautiful prismane-molecule. 

.72 is a non-repeating decimal whose fractional equivalent is just 72/100

By doing extra homework and by learning more at school, and by paying attention to the class. 

Just pay attention to the teacher, and ask the teacher if you don't understand something.

just write the letter with the equation when you want to put the letter

It's the order of amino acids on the smallest scale. Like this:

....-Gly-Thr-Ser-Trp-Ala-Val-...

In secondary -, tertiary - and quartenery structure of a protein, we look at larger portions of the protein.

What do you mean Pumpkinguy? Do you want a graphing calculator? Then, just go to the Desmos Graphing Calculator.

An amino group  ( -NH2 ) and an acid group ( COOH ). 

Keep in mind that though it's written on paper like this, in actual fact it's ( NH3+) and (COO-). 

m³ = 512    take the cube root of both sides

m= ³√512 = 8

$$1+1=2$$

No is it good?

yes! and it is due tomorrow!!!!!!!!!

it is very nice and a big thank you, rosala! 

4 2/5 + k= -3 2/11

Here we have two mixed numbers. Be very careful when handeling negative mixed numbers. Don't coonfuse "-3 2/11" with "-3 + 2/11"

4 2/5 + k = -3 2/11

I add a minus into the mixed fraction on the right. Of course you don't have to write an entire new line when you do calculations on paper. 

4 2/5 + k = -3 -2/11

k = - 3 - 4 - 2/5 - 2/11

k= - 7 -2/5 -2/11

Make common denominators. Both 11 and 5 is prime numbers (numbers that are only divisible by one and itself). Therefore the common denominator is 5*11=55. 

k= - (7*55)/55 - (2*11)/(5/11) - (2*5)/(11*5)

k = - 385/55 - 22/55 -10/55

k = - (385 +22+10)/55

k = - 417/55

Since 417 isn't divisible by neither 11 nor 5, this fraction is in it's simplest form. 

Just add the fractions and divide by the number of fractions we have.....

So we have.....

1/2+ 5/8+ 4/6 + 3/2 = 79/24   Now...divide this 4  =

79/96

I assume you want to factor this.....so we have

3x^2-3x-36      take out the common factor (3)

3(x^2 - x -12)        Now, we're looking for two numbers that multiply to -12 and sum to -1......-4 and 3 seem to work......so we have

4(x - 4) (x + 3)

And there you go.......

Melody said 1+1=2

 [56.28 /  6 ] = 9.38 lbs per bag