Bell Ringer

Calculate the average of the following list of numbers. 10 15

5 8 9

What did you do over thanksgiving?

Objective

• I can solve one step equations.• I can find the midpoint of a line.

What are equations?

•X + 19 = 27

•We are trying to solve for X

Variable- representing what we are trying to solve for.

To solve:

• Use the opposite operation to solve:• + then use –• - then use +• (x) or # next to a variable ÷• ÷ or / then use x

Example• X – 15 = 12• +15 +15• X + 5 = 37• - 5 - 5• 3x= 36• ÷3 ÷3• x/4 = 6• *4 *4

• 27

• 32

• 12

• 24

Midpoint- the half way point between two points on a line.

Half way between 0 and 4 would be 2.

Using a formula, how could we calculate this?

Midpoint of a line

Midpoint = (x + y ) ÷2

Example (4 + 0) = 4

4 ÷ 2= 2 The midpoint is 2

Midpoint formula

Midpoint with negative numbers

Find the Midpoint

(2 + -4) = -2 ÷ 2 =-1

Practice