Lesson 3 6 Solve Proportions Using Cross Products
- Slides: 9
Lesson 3. 6: Solve Proportions Using Cross Products Clear Targets: ▪ Solve proportions using cross products ▪ Write proportions from word problems
- The product of the factors diagonally across from each other in a proportion - A drawing that is proportionally smaller or bigger to an original drawing - A model that is proportionally smaller or bigger to an original model - The ratio of the dimensions of a scale drawing/model to the original drawing/model
equal 6 5 bc
Ex/ 2: Write and solve a proportion. To feed your plants, you need to mix 3 tablespoons of plant food with 16 ounces of water. If it takes 80 ounces of water to feed all of your plants, how may tablespoons of plant food are needed? Step 1: Write the proportion. BE CONSISTENT!!!! Step 2: Solve the proportion.
Ex/ 3: Use a scale model An architect creates a scale model of a school. The school is 50 feet high. The ratio of the model to the actual school is 1 foot to 75 feet. Estimate the height of the model. **The first part of the proportion should ALWAYS be the scale!!!!
Do you feel like you understand can demonstrate the clear targets for today? • Clear Targets: ▪ Solve proportions using cross products ▪ Write proportions from word problems **Please see me for extra help if you don’t!!! HW: 3. 5 WB # 19 -22, & 3. 6 WB #2 -24 even