A = 5y (7y - 4) multiply 5y by 7y and -4

5y (7y) = 35y^2 (y^2 means y squared)

5y (-4) = -20y

= 35y^2 - 20y

The area of the figure is 35y^2 - 20y square units. « simple sentence answer20. Apply the distributive property to simplify 2x (x-4) - 3x (x - 4).

2x (x-4) -3x (x-4)

=2x^2 - 8x - 3x^2 + 12x remember that it's -3x (x-4). Multiply 2x(x-4) and -3x (x-4)

=2x^2 - 3x^2 - 8x + 12x then you combine like terms

=-x^2 + 4x

21. A pool table is twice as long as it is wide. If the area of the pool table is 2.88m^2, what are the dimensions of the table?

I find it helpful to draw a diagramA = lw

2.88 = 2w(w)

2.88 = 2w^2

2.88/2 = 2w^2/2

1.44 = w^2

then you find the square root

1.2 = w

The length is 2 times the width

l = 2w The dimensions are length = 2.4m and width = 1.2m.

l = 2 (1.2)

l = 2.4

We also went over these two questions.

(x + 5)^2 = (x +5) (x+5)

= x^2 +5x + 5x +25

= x^2 +10x + 25

2. 3(x+2)^2 = 3 (x+2) (x + 2)

= (3x + 6) (x+2)

= 3x^2 + 6x + 6x + 12

= 3x^2 + 12x + 12

Homework:

Get ready Chapter 6

go to www.mathplayground.com and play "zogs"

Well, that's all for my scribe. If I missed anything, please let me know. PLEASE COMMENT! (also, I have no idea who hasn't done a scribe yet, so if you haven't, YOU'RE NEXT :P) Okay, bye.

## 3 comments:

Nice scribe Kristin! I really like your use of colours and nice pictures. Good job in explaining the test. I don't think you made any errors. So great job again!

Good job Kristin! Great use of colours, and pictures. You explained it very well. Good job again! :)

Great job Kristin! Great job explaining the questions from the test! Although at the end everything is a bit crowded, you maybe could space it out a bit. Overall Great Scribe!

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