Review: Ratios & Proportions

Review: Ratios & Proportions

Steps

• Put parenthesis around any expressions

• Cross multiply

• Solve

Put parenthesis around k+2

Move any floating negatives to the top

What steps do you need to take BEFORE you can cross multiply?

Proportions Word Problems

• Set up the word ratio first; find the two units being compared

• THE ORDER MATTERS

• Fill in the given info and put a variable for the unknown

• Solve

What are the two unit beings compared?

Multiple Choice

Solve the proportion:

• 4

• 21

• 24

• 3

Multiple Choice

Solve for c

• -7/2

• -2

• -1

• -13/2

Multiple Choice

Solve for k

• 165
• 17
• 1/17
• 1/165

Multiple Choice

Hamburger meat sells for $6 for every 3 pounds. If Alicia buys 10 pounds of hamburger meat, how much will she pay?

• $30
• $20
• $60
• $10

Multiple Choice

The distance that an automobile travels varies directly as the time it travels. If the car travels 280 miles in 7 hours, how far will it travel in 12 hours?

• 480
• 1960
• 84
• 25