Khan Academy
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) (?)