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Good work anonymous - It is correct.

I'd just like to show you an easier way.

6+2=8 hours altogether

40 divided by 8 = 5 pounds per hour.

Mary worked for 6 hours so she will get paid 6*5 = 30pounds

Can you give us an example of the type of question that you are having trouble with?

Factor method can mean a lot of different things.

And as Aziz said.  If you are seriously having these thoughts  you need to talk to someone.

If you do not know who is available then talk to your doctor. They'll put you in touch with someone appropriate.

In most countries these services are very confidential and often they are free.

Haha, yep. Doooooom.

Let's set up an equation after defining some variables:

L = length & W = width

W = L - 100 (width is 100 feet less than the length)

Perimeter of a rectangle is 2L + 2W...

2L + 2(L - 100) = 340.

Distribute the 2.

2L + 2L - 200 = 340.

Combine like terms and add 200 to both sides.

4L = 540.

Solve for L.

L = 540/4 = 135.

So, W = L - 100 = 135 - 100 = 35.

L = 135 ft.

W = 35 ft.

Check: 2L + 2W = 340.

2(135) + 2(35) = 340.

270 + 70 = 340. Yes.

First, do the parentheses.

Then, multiply.

Finally, subtract.

Post what you get. 

Use the vectors/matrices function on the on-site calculator found on the home page.

By default, it is Scientific and greyed out on the white rectangle where you input values. Click that area and select "Vectors/matrices."

From there you can input values and solve.

Note that 16 does not equal -4 so you cannot add 4 to both sides to get 20...

A linear equation is something that produces a line on a graph found in the format y = mx + b with m as the slope, b as the y-intercept (when x = 0), and x & y as the points on the graph.

A simple linear equation is y = x. Note, that this is basically a line passing through the origin (0,0) and is diagonal. Since y =x, we get a line with a slope of 1.

Think of 6.25 as 625/100.

Now, simplify as much as possible.

That's it. 

1.47 m/s is about the average rate people walk.

It happens to the best of us   lol   

There is no minus sign there 

$$\sqrt{0.49}=0.7$$

If the sqrt is in the question the only answer is the positive one. 

This is by convention.  

Also negative numbers do not have any real square roots (They have an imaginary one)

Ahh, I have no idea why I did that...I guess I was trying to find a different way with 100s.

I think I'm going crazy. :p

You can find an equivalent expression by distributing the 20 and -4.

20x - 20y - 4x - 4y.

Collect like terms:

20x - 4x - 20y - 4y.

16x - 24y.

Why did you multiply by 100 Aziz?

This is from the home page calculator.

$$-{\mathtt{0.058\: \!823\: \!529\: \!411\: \!764\: \!7}} = {\mathtt{\,-\,}}{\frac{{\mathtt{1}}}{{\mathtt{17}}}}$$

Simply plug in 20 for n and solve.

Let's set up an equation after defining some variables:

L = length & W = width

L = W + 10 (length is 10 more feet than the width)

Perimeter of a rectangle is 2L + 2W...

2(W + 10) + 2W = 44.

Distribute the 2.

2W + 20 + 2W = 44.

Combine like terms and subtract 20 from both sides.

4W = 24.

Solve for W.

W = 24/4 = 6.

So, L = W + 10 = 6 + 10 = 16.

L = 16 ft.

W = 6 ft.

Check: 2L + 2W = 44. 

2(16) + 2(6) = 44.

32 + 12 = 44. Yes.

Note, your answer will be negative and you need to find a common denominator. In this case, it is easiest to multiply 2 and 49 to get a common denominator of 98.

Since both denominators are 98, you need to multiply 7 by 49 and -4 by 2.

Now, just add the two negatives!

Type in acos in the calculator or you can first press the "2nd" key and then select "acos."

If there is only 1 value, then it has to be the median! So, 21 is the median.

Convert 1 3/8 to an improper fraction and then add.

1 3/8 --> (1*8 + 3) / 8 = 11/8.

5/32 + 11/8.

The easiest common denominator is 32 - multiply both the numerator and denominator of 11/8 by 4.

5/32 + 44/32.

You should be able to take it from there.

Be more specific please.

$$\left({\frac{{\mathtt{7}}}{{\mathtt{10}}}}\right){\mathtt{\,\times\,}}\left({\frac{{\mathtt{27}}}{{\mathtt{7}}}}\right) = {\frac{{\mathtt{27}}}{{\mathtt{10}}}} = {\mathtt{2.7}}$$