McGraw-Hill Education SAT 2021 by Christopher Black

Author:Christopher Black
Language: eng
Format: epub
Publisher: McGraw-Hill Education
Published: 2020-08-15T00:00:00+00:00

20. B The average speed is equal to the total distance divided by the total time. The total distance is 200 miles. The time for the first hundred miles is (100 miles/

50 mph) = 2 hours, and the time for the second hundred miles is (100 miles/75 mph) = 4/3 hours. Therefore the total time of the trip is 2 + 4/3 = 10/3 hours, and the average speed is

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22.

Lesson 5: Constructing and interpreting linear equations

Linear Equations from Word Problems

When setting up linear equations from word problems, consider which linear form matches the information you are given.

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