Algebra 1 CH 3.5 Write Ratios and Proportions.notebook
Algebra 1 CH 3.5 Write Ratios and Proportions.notebook
Write Ratios and Proportions
October 24, 2014
Write Ratios and Proportions A ratio is a comparison of two quantities using a quotient.
a to b
Objective: Find ratios and write and solve proportions.
or
a:b or
Oct 146:23 PM
Oct 146:23 PM
Write Ratios and Proportions
Write Ratios and Proportions
5 hours to 3 hours
A softball team plays 24 home games and 18 away games.
• Write a ratio of home games to away games.
5 to 3 or
or
5:3
• Write a ratio of home games to all games.
Oct 146:23 PM
Oct 146:23 PM
Write Ratios and Proportions
Write Ratios and Proportions
A supermarket charges the following prices for peanut butter.
Size 18 oz 28 oz 40 oz
Price $1.78 $2.97 $3.98
Oct 146:23 PM
Size
Price
Unit Cost
Unit Cost
18 oz
$1.78
$0.099
28 oz
$2.97
$0.106
40 oz
$3.98
$0.100
Oct 146:23 PM
1
Algebra 1 CH 3.5 Write Ratios and Proportions.notebook
Write Ratios and Proportions A proportion is an equation that states two ratios are equal.
October 24, 2014
Write Ratios and Proportions 4 is to 13 as x is to 39
3 is to x as 15 is to 25
Oct 146:23 PM
Write Ratios and Proportions
Oct 146:23 PM
Write Ratios and Proportions
Cross Multiplication Proportions can be solved with cross multiplication.
Oct 146:23 PM
Write Ratios and Proportions
Oct 146:23 PM
Write Ratios and Proportions A recipe for salsa calls for 30 tomatoes to make 12 pints of salsa. How many tomatoes are needed to make 4 pints of salsa?
Small Recipe Large Recipe
Oct 146:23 PM
Tomatoes
Pints
???
4
30
12
Oct 146:23 PM
2
Algebra 1 CH 3.5 Write Ratios and Proportions.notebook
Write Ratios and Proportions
October 24, 2014
Write Ratios and Proportions Objective: Find ratios and write and solve proportions.
Oct 146:23 PM
Oct 146:23 PM
3
Write Ratios and Proportions
October 24, 2014
Write Ratios and Proportions A ratio is a comparison of two quantities using a quotient.
a to b
Objective: Find ratios and write and solve proportions.
or
a:b or
Oct 146:23 PM
Oct 146:23 PM
Write Ratios and Proportions
Write Ratios and Proportions
5 hours to 3 hours
A softball team plays 24 home games and 18 away games.
• Write a ratio of home games to away games.
5 to 3 or
or
5:3
• Write a ratio of home games to all games.
Oct 146:23 PM
Oct 146:23 PM
Write Ratios and Proportions
Write Ratios and Proportions
A supermarket charges the following prices for peanut butter.
Size 18 oz 28 oz 40 oz
Price $1.78 $2.97 $3.98
Oct 146:23 PM
Size
Price
Unit Cost
Unit Cost
18 oz
$1.78
$0.099
28 oz
$2.97
$0.106
40 oz
$3.98
$0.100
Oct 146:23 PM
1
Algebra 1 CH 3.5 Write Ratios and Proportions.notebook
Write Ratios and Proportions A proportion is an equation that states two ratios are equal.
October 24, 2014
Write Ratios and Proportions 4 is to 13 as x is to 39
3 is to x as 15 is to 25
Oct 146:23 PM
Write Ratios and Proportions
Oct 146:23 PM
Write Ratios and Proportions
Cross Multiplication Proportions can be solved with cross multiplication.
Oct 146:23 PM
Write Ratios and Proportions
Oct 146:23 PM
Write Ratios and Proportions A recipe for salsa calls for 30 tomatoes to make 12 pints of salsa. How many tomatoes are needed to make 4 pints of salsa?
Small Recipe Large Recipe
Oct 146:23 PM
Tomatoes
Pints
???
4
30
12
Oct 146:23 PM
2
Algebra 1 CH 3.5 Write Ratios and Proportions.notebook
Write Ratios and Proportions
October 24, 2014
Write Ratios and Proportions Objective: Find ratios and write and solve proportions.
Oct 146:23 PM
Oct 146:23 PM
3
