Khan Academy

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SKILL Ratios, rates, and proportions

-7 sold in 4 cups therefore three remaining -form ration accordingly for cones

SKILL Solving quadratic equations

-change form to a letter (Y) -2 solutions because square root is always 2 (positive and negative)

SKILL Quadratic and exponential word problems

-coffee exponential word problem (?)

SKILL Solving linear equations and linear inequalities

-inequalities = absolute value (distance in scale)

SKILL Radical and rational equations

-question asking to make 2 = x (as only solution) -quadratic (2 solutions) -solve for c then plug in c and solve x -if equation satisfied in both sides that is the only value for c to make x=2

SKILL Solving systems of linear equations

-substitute value of 7 into both an math it a system of equations to find a (since they start equal to each other it will mean same thing)

SKILL Polynomial factors and graphs

(?)

SKILL Right triangle trigonometry

-remember similar triangles have the same angles

SKILL Data inferences (with margin of error)

Question: Hydrologists collected water samples from a river for several years. They found 62 out of 648 samples exceeded the desired pH levels, with a 2%, percent margin of error at a 90%, percent confidence level. Which of the following is the most reasonable conclusion?

SKILL Linear equation word problems

Total of 350 minutes to finish the book, 350-s READING the book 10/15 is rate 15/10 is rate of skimming 10/15(350-s) (?)


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