Video by Julie Harland http://yourmathgal This video goes over a rate-time-distance word problem where only the distance is known. Solved using one variable, using the fact that t = d/r. Solved using a rational equation and quadratic equation.<br />For more great math videos visit: www.youtube.com/user/videosbyjulieharland/videos<br />Aligned to Common Core State Standard: 6.EE.6 , 7.EE.4 , 8.EE.8
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Subject
Math — Algebra, Expressions and Equations
Grade Level
Grades 6-12
Standards Alignment
Common Core State Standards
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Standards
Use variables to represent numbers and write expressions when solving a real-world or mathematical problem; understand that a variable can represent an unknown number, or, depending on the purpose at hand, any number in a specified set.
Use variables to represent quantities in a real-world or mathematical problem, and construct simple equations and inequalities to solve problems by reasoning about the quantities.
Analyze and solve pairs of simultaneous linear equations.
