Proportions

Isaias Vasquez Ms.Sa
702 4/3/09

Aim : How do we solve proportions by using cross products?

1) The term cross product can help us remember how to solve a proportion. When they have you cross product. When the answer are both the same it proportions.

2) They are did some thing right. But they put the wrong answer. They should have put 36. But they put 18. That divided the 36 to 2 and got 18.

3)You can find the answer by using the cross products 6 2
-- =--
45 15
by first multiply 6 and 15 that makes 90. They multiply 45 and 2 makes 90. That makes it a proportion.

native american museum

In the museum I learn that Native American do not like be call indans. The have told story. One of they was about the bird man. They have mask to tell the story and there history.

Aim:How do we evalulate algebraic expression?

Isaias Vasquez Ms.Sa
3/13/09 Math 702


12x 4/y 3xy/2
12•x 4÷y 3•x•y/2


The different between a variables and constant is that variables is when a letter represets a number that can vary a variable. A constant is a number that can not change. The Variables change when the constant .

SAMPLING METHODS

date 2/4/09

The people that like to run track. People from Cis.339 school.

Random Sample:
The first 30 people going in to the cis339 gym.

Convenience Sample:
The first 15 people next the me in lunch.

Biased Sample:
The first 10 people I see that are running a tract met