Weight and Speed Problem Solving

The video tutorial covers lesson 28, focusing on solving two-step problems using tape diagrams. The first problem involves calculating Diego's weight based on given conditions about Juan and Rashad's weights. The teacher explains how to set up the problem, create tape diagrams, and solve the equation. The second part introduces a multiplication problem involving Lance's biking speeds, demonstrating how to use tape diagrams to solve it. The tutorial emphasizes visual problem-solving techniques and provides a step-by-step approach to understanding and solving mathematical problems.

What is the main focus of lesson 28?

• One-step problems

• Two-step problems

• Three-step problems

• Four-step problems

What tool is primarily used to solve the two-step problems in this lesson?

• Graphs

• Tables

• Equations

• Tape diagrams

If Rashad is 15 pounds heavier than Diego, and they weighed the same as Juan last year, how do you represent Rashad's weight?

• D + 20

• D - 15

• D + 15

• D - 20

What is the total weight of Juan this year if he gained 20 pounds since last year?

• 160 pounds

• 140 pounds

• 120 pounds

• 100 pounds

How do you solve for Diego's weight using the equation D + 35 = 120?

• Subtract 35 from both sides

• Divide both sides by 35

• Add 35 to both sides

• Multiply both sides by 35

What is the weight of Diego after solving the equation?

• 95 pounds

• 115 pounds

• 85 pounds

• 105 pounds

What is Lance's speed when riding downhill?

• 50 miles per hour

• 60 miles per hour

• 40 miles per hour

• 70 miles per hour

If Lance's downhill speed is four times his flat road speed, what is his flat road speed?

• 10 miles per hour

• 15 miles per hour

• 20 miles per hour

• 25 miles per hour

How much slower is Lance's uphill speed compared to his flat road speed?

• 5 miles per hour

• 8 miles per hour

• 6 miles per hour

• 7 miles per hour

What is Lance's speed when riding uphill?

• 8 miles per hour

• 5 miles per hour

• 6 miles per hour

• 7 miles per hour