Rates

Question 1

What is t he equation to solve for the rate for machines working together?

Answer 1

Add the individual machine rates to get the combined new rate

This works because both are working together and so it should go a bit faster in the same amount of time.

OG15 PS179 PS139

Question 2

How do you solve for multiple rates?

Answer 2

Set up a rate chart :

R x T = D

Question 3

How do you solve for a rate of objects moving towards each other?

Answer 3

Add the individual rates to get the 3rd rate for how fast they are moving towards each other

Question 4

How do you solve for a rate for objects moving apart

Answer 4

Add the individual rates to get the 3rd rate for how fast they are moving away from each other

Question 5

How do you solve for a rate of objects moving in the same direction?

Answer 5

Subtract the individual rates to get the 3rd rate for how fast they are moving in the same direction.

Question 6

How do you solve for the average rate for the same distance? (fix card when you learn about rates)

Answer 6

Avg speed = (Total D/Total Time). It is always closer to the slower rate.

Question 7

How should you approach every rate problem?

Answer 7

1. Make the appropriate chart
2. fill in what i know: the numbers and relationships between numbers
3. solve for the unknown
4. know how to guess (which answer choices are completely ridiculous?)