AzizHusain

Add 1 to both sides.

k/9 = 11

Multiply both sides by 9.

k = 99.

1/2 * 3/4

Simply multiply both numerators and both denominators:

1/2 * 3/4

(1*3) / (2*4)

3 / 8

3/8.

Think of 3.97 as 397. How would you get from 3.97 to 397? Multiply by 100. Alternatively, 397/100 = 3.97.

So, you now have 397/100.

25x(x + 1) = 6.

25x must be multiplied with both terms inside the parentheses.

25x*x + 25x*1 = 6.

25x^2 + 25x = 6.

25x^2 + 25x - 6 = 0.

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.