MATH056 IMMERSION Dr Jason Samuels simplify the expression tutoring M-Th M1203
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1 MATH056 IMMERSION Dr Jason Samuels simplify the expression tutoring M-Th M1203 # identify every calculation that order of operations tells you to do in the next step # check your signs
2 solve for the given variable to solve for a variable (which appears as itself, no exponent) # get all of its terms to one side, then factor it out
3 simplifying expressions: turning fractions inside fractions into simple fractions # multiply by the LCD in both the numerator and
4
5 solving equations involving fractions
6 simplifying expressions with fractions: multiplying & dividing
7
8
9
10 simplifying expressions with fractions: adding and subtracting
11 simplifying expressions with fractions: multiplying and dividing
12 quadratics: factoring
13
14 complex numbers
15
16 combining techniques
17 # get rid of square root...square both sides # you get a quadratic equation, so solve it # check your solutions (square root sometimes removes one solution)
18
19 radicals, simplifying radicals, rationalize the denominator # to make the radical in the denominator go away, multiply by the "irrational conjugate"
20
21 exponents, fractional, in arithmetic exponents, in algebra
22 negative exponents simplify expressions involving exponents
23
24
25 inequalities, one variable solving equations, two variables
26 solving equations with two variables, word problems ex) one family went to the movies and bought 3 adult tickets and 5 children tickets for $71. another family at the same theater bought 2 adult and 4 children tickets for $52. how much does each adult and child ticket cost? ex) Mike bought 9 stamps for $3.32. Postcard stamps are 28 cents and forever stamps are 48 cents. how many of each did he buy? ex) Rochelle buys 14 pieces of fruit for $7.35. Apples are $0.40 each, nectarines are $0.75 each. how many of each did she buy?
27 Absolute value equations & inequalities
28
29 Lines definition - graph & formula slope - graph & formula intercepts - graph & formula to find slope of a line, given a formula, put in y = mx+b form (easiest)
30 to find slope, given the graph, count boxes, calcuate rise/run x-intercept: where graph crosses x-axis y-intercept: where graph crosses y-axis
31 combine ideas to graph the line, given "y=mx+b", mark the y-intercept, follow the slope up&over to mark another point, then draw a line
32 tricky application ex) find the equation of the line parallel to y=4x-1, through the point (3,2) ex) find the equation of the line perpendicular to 3x + 5y = 12 through the point (5,- 2)
33 ex) find the equation of the line parallel to 2x-7y=12, through the point (-3,-1) ex) find the equation of the line through (4,5) and (3,-1)
34 Logs ex) simplify log464 ex) simplify log216 ex) simplify log636 ex) solve for x: logx25 = 2 ex) solve for t: log5t = 3 ex) simplify: log
35
36 Log rules 1) log b r x = x log b r 2) log b r + log b s = log b (rs) 3) log b r - log b s = log b ( r / s )
37 ex) simplify as one log term: ex) simplify as one log term: ex) simplify as one log term: ex) simplify as one log term:
38
39 Trig relationships (ratios) in a right triangle
40
41
42 lets see what this has to do with trig
43 extending trig to all angles the adjacent side wil be represented by an x-value. ~to the right, values are positive. to the left, values are negative (like the x-axis) the opposite side wil be represented by a y-value. ~to the top, values are positive. to the bottom, values are negative (like the y-axis) the hypotenuse is always positive
44 find the following values sin(225), cos(225), tan(225) you can fill in the pos/neg for the numbers right on the diagram sin(150), cos(150), tan(150) sin(-60), cos(-60), tan(-60) for a negative angle go "backwards" (clockwise) from 0 ex) find sin(300), cos(300), tan(300) ex) find all the sides
45 ex) if sinθ = -1/2, find tanθ if θ is in the a) 3rd quadrant b) 4th quadrant ex) if tan θ = 2/7, find sinθ and cosθ if θ is in the 3rd quadrant
46 ex) if sec θ = 5/4, find sinθ and tanθ if θ is in the 4th quadrant ex) you leave a building, walk 100 feet, then turn around and look up at the top of building at a 60 degree angle. how tall is the building? ex) you tie down a 12 foot pole (standing straight up) with a wire that makes a 45 o angle with the ground. how long is the wire?
47 more coverage: complex fractions graph the line literal equation multiply & divide rationals logs ex) solve for t: a 2 + mt = qt - x ex) solve for v: p = q + vt + 0.5at 2 ex) solve for v: K = 0.5mv 2
48 ex) for 2x-5y=10, find the slope & y-intercept and graph it ex) simplify: log 8 4 ex) rewrite as one log: -2log(x) + 1/ 3log(y) - 4log(z)
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