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The decimal 0.175 is the same as 175/1000.

Simplify the fraction by dividing both the numerator and the denominator by their greatest common factor, 25:

$${\frac{{\mathtt{175}}}{{\mathtt{1\,000}}}} = {\frac{{\mathtt{7}}}{{\mathtt{40}}}}$$

Enter this into the website calculator with the correct parentheses. http://web2.0calc.com/

Assuming you meant negative six and one-half divided by negative two-thirds:  (-6 + 1/2) / (-2/3)

$${\frac{\left({\mathtt{\,-\,}}{\mathtt{6}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{1}}}{{\mathtt{2}}}}\right)}{{\mathtt{\,-\,}}\left({\frac{{\mathtt{2}}}{{\mathtt{3}}}}\right)}} = {\frac{{\mathtt{33}}}{{\mathtt{4}}}} = {\mathtt{8.25}}$$

Subtracting a negative number is the same as adding the correlating positive number.

So 5 - (-8) is the same as 5 + 8.

I would be happy to assist you further if you need more help, but I believe you can take it from there:)

@ MAB25MAB: If 17.27 were the diameter, your answer would be correct.

However, Circumference is pi * the diameter, not twice the radius. 

$${\mathtt{C}} = {\mathtt{\pi}}{\mathtt{\,\times\,}}{\mathtt{d}}$$

Substitute in 17.27 for C:

$${\mathtt{17.27}} = {\mathtt{\pi}}{\mathtt{\,\times\,}}{\mathtt{d}}$$

$${\frac{{\mathtt{17.27}}}{{\mathtt{\pi}}}} = {\mathtt{d}}$$

$${\frac{{\mathtt{17.27}}}{{\mathtt{\pi}}}} = {\mathtt{5.497\: \!211\: \!734\: \!394\: \!064\: \!9}}$$

d = 5.497

Radius is half of the diameter:

$${\mathtt{r}} = {\frac{{\mathtt{d}}}{{\mathtt{2}}}}$$

$${\mathtt{r}} = {\frac{{\mathtt{5.497}}}{{\mathtt{2}}}} \Rightarrow {\mathtt{r}} = {\mathtt{2.748\: \!5}}$$

The radius is approximately 2.75 inches.

Enter this into the calculator and hope it's the answer to your rather wordy question:)

4/5 + (3/5 * 7/18) -0.2

$${\frac{{\mathtt{4}}}{{\mathtt{5}}}}{\mathtt{\,\small\textbf+\,}}\left({\frac{{\frac{{\mathtt{3}}}{{\mathtt{5}}}}{\mathtt{\,\times\,}}{\mathtt{7}}}{{\mathtt{18}}}}\right){\mathtt{\,-\,}}{\mathtt{0.2}} = {\frac{{\mathtt{5}}}{{\mathtt{6}}}} = {\mathtt{0.833\: \!333\: \!333\: \!333\: \!333\: \!3}}$$

In order to get the variable a by itself, you'll need to take the base of natural log (e) of both sides of the equation.

ln(a) = -7.5975

e^(ln(a)) = e^(-7.5975)

a = e^(-7.5975)

a = 0.0005

Or, in a more sophisticated-looking format:

$${ln}{\left({\mathtt{a}}\right)} = -{\mathtt{7.597\: \!5}} \Rightarrow {\mathtt{a}} = {{\mathtt{e}}}^{{\mathtt{\,-\,}}\left({\frac{{\mathtt{3\,039}}}{{\mathtt{400}}}}\right)} \Rightarrow {\mathtt{a}} = {\mathtt{0.000\: \!501\: \!704\: \!127\: \!239}}$$

be more specfic

17.27/2=8.635

5.11764705882353

6/36

=1/6

thats the answer :)

Area  =  L · W  =  77

L = 2W + 3

Substituting:  (2W + 3)(W)  =  72

     2W² + 3w  =  77

     2W² + 3w - 77  =  0

     (2W - 11)(w + 7)  =  0

Either 2W - 11  =  0  --->   2W  =  1   --->   W  =  5.5   --->   L  =  2(5.5) + 3   --->   L  =  14

Or:     w + 7  =  0   --->   w  =  -7   (impossible)

5/7=20/28 because 28 divided by 7 is 4 and if you multiply 5 by 4 you get 20.

2 times ten equals twenty. If you addten to ten you would get twenty. You are doulbling the ten.

An hour is 60 minutes. If you ran for 20 minutes, you ran for 20/60 = 1/3 of an hour.

If you ran 1/3 of an hour, you also ran 1/3 of the distance:  (1/3) x (15)  =  5 km.

First, calculate how much  Seth will save every time that he goes to the movie:  $3.50 - $1.00  =  $2.50.

Now we need to calculate how many times $2.50 goes into $40.00.

$40.00 ÷ $2.50  =  <the answer>

Get it into the form so that you can use the quadratic formula.

x² + 14x = 33     --->     x² + 14x - 33  =  0

a = 1   b = 14   c = -33     Quadratic formula:  x  =  [ -b ± √(b² -4·a·c) ] / (2·a)

Positive solution:  x  =  [ -14 + √(14² -4·1·-33) ] / (2·1)  =  [-14 + √328]/2

     =     [-14 + 2√82]/2     =     -7 + √82     =     √82 - 7

(Notice that the problem has a to be the value under the square root sign and b is the number after the minus sign.)

--->  a  =  82     and  b = 7

So, how much is  a + b ?

1,000,000,000. Nine zeros.

3(x/4)  =  -6(2x - 17)

Simplify the lef-hand side:

3x/4  =  -6(2x - 17)

Distribute the right-hand side:

3x/4  =  -12x + 102

Multiply each term by 4:

3x  =  -48x + 408

Get all the x-terms to one side; add 48x to both sides:

51x  =  408

Divide by 51:

x  =  8

thank you so much!

the time is 1.5  (probably seconds, but that isn't specified).

wait, is the time 1.5? Is that the answer?

The total weight is 37.5 ounces. There are 15 markers, each weighing the same amount.

To find out how much each one weighs, divide the 37.5 ounces by 15.

37.5 ÷ 15  =       <---   your answer.

so, at what time is the height of the ball at its maximim? Sorry i need this quick

You need to know the location of the vertex, which is the highest point.

Your expression, -25t² + 75t + 24  has the form  at² + bt + c,  so  a = -25,  b = 75,  and  c = 24.

The x-vaue of the vertex can be found by using this little formula:  x-value  =  -b/(2a).

For this problem, the x-value of the vertex is  -75/(2·-25)  =  -75/-50  =  1.5

This represents the time of the maximum height; time = 1.5.

There are two parts, the number and the variable.

First, the number:  √18  =  √9·√2  =  3√2 

Now, the variable:  √x²  =  |x|    (You need absolute value bars because √(-3)²   isn't  -3,  it's  +3.

Putting these together:   3√2|x|    <---   answer