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Comparing areas of plots of land | Measurement | Pre-Algebra
By Khan Academy
Find area of two rectangles to solve a word problem.
Comparing data displays
By Khan Academy
Sal solves practice problems where he thinks about which data displays would be helpful in which situations.
Computing in scientific notation
By Khan Academy
Learn how to simplify a multiplication and division expression using scientific notation. The expression in this problem is (7 * 10^5) / ((2 * 10^-2)(2.5 * 10^9)).
Linear models word problems
By Khan Academy
Sal solves a word problem about a person reading a book, The solution involves the modeling of the situation as a linear function.
Compound inequalities
By Khan Academy
Sal solves the compound inequality 5x-3<12 AND 4x+1>25, only to realize there's no x-value that makes both inequalities true.
Compose functions
By Khan Academy
Sal solves the following problem: Given that f(x)=������������������(x^2-1) and g(x)=x/(1+x), find f(g(x)) and g(f(x)).
Determine whether two triangles are congruent
By Khan Academy
Sal uses the SSS, ASA, SAS, and AAS postulates to find congruent triangles.
Complex plane operations
By Khan Academy
Sal adds������������(5+2i) and (3-7i) .
Creating the largest possible number | Arithmetic properties | Pre-Algebra | Khan Academy
By Khan Academy
Taking numbers and moving them into different place values to create the highest (and lowest) numbers possible.