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Math Strategy #2: Backsolving Start with the answers and plug them into the problem to find the correct one.

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Presentation on theme: "Math Strategy #2: Backsolving Start with the answers and plug them into the problem to find the correct one."— Presentation transcript:

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2 Math Strategy #2: Backsolving Start with the answers and plug them into the problem to find the correct one.

3 Math Strategy #2: Backsolving Problem: A music club draws 27 patrons. If there are 7 more musicians than singers in the club, how many patrons are musicians? a)8 b)10 c)14 d)17 e)20

4 Math Strategy #2: Backsolving Problem: If a + b + c = 110, a = 4b, and 3a = 2c, then b = a)6 b)8 c)9 d)10 e)14

5 Strategy Mini-Quiz

6 Topic #2: Right Triangle Geometry 1)Pythagorean Theorem 2)Special Right Triangles 45-45-90 30-60-90

7 Straight from the Formula Reference Sheet

8 Pythagorean Theorem Given a right triangle with a hypotenuse of length 15 and a leg of length 9, find the length of the second leg.

9 Pythagorean Triples MEMORIZE THEM, KNOW THEM, LOVE THEM

10 What’s the Length of the Missing Side?

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15 5-11 5-18

16 The Distance Formula

17 Special Right Triangles http://cdn. kutasoftware.com/Worksheets/Geo/8- Special%20Right%20Triangle s.pdf 45-45-90 30-60-90

18 Special Right Triangles 45-45-90’s are cut out from a square

19 Special Right Triangles 30-60-90’s are cut out from an equilateral triangle

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21 Work Time 1)Simple Assignment (not due) 2)Complex Assignment (due Monday)

22 Topic #2: Numerical Reasoning

23 Strategy 1: Picking Numbers Problem: If a is an odd integer and b is an even integer, which of the following must be odd? a)2a+b b)a+2b c)ab d)a 2 b e)ab 2

24 Strategy 1: Picking Numbers Problem: From 1985 to 1990, the berry production of bush x increased by 20 percent. From 1990 to 1995, the berry production increased by 30 percent. What was the percent increase in the berry production on the bush over the entire ten-year period from 1985 to 1995? a)10% b)25% c)50% d)56% e)60%

25 Strategy 1: Picking Numbers Problem: If n sunglass lenses cost p dollars, then how many dollars would q sunglass lenses cost? a)nq/q b)nq/p c)pq/n d)n/pq e)p/nq

26 Strategy Practice 20 minutes

27 Resources 1)Mastering the SAT (on my DP) 2)Math Vocabulary Sheet (on my DP) 3)Facts and Formulas Sheet (on my DP) 4)ProProfs Tracker (live and in person!)


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