Sal Khan shows the viewer how to evaluate an expression with two variables.
Evaluating Expressions with Two Variables - Khan Academy is a free educational video by Khan Academy.It helps students in grades 6 practice the following standards 6.EE.2,6.EE.2.c,.
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1. 6.EE.2 : Write, read, and evaluate expressions in which letters stand for numbers..
2. 6.EE.2.c : Evaluate expressions at specific values for their variables. Include expressions that arise from formulas in real-world problems. Perform arithmetic operations, including those involving whole-number exponents, in the conventional order when there are no parentheses to specify a particular order (Order of Operations). For example, use the formulas V = s^3 and A = 6 s^2 to find the volume and surface area of a cube with sides of length s = 1/2. .