SAT math essentials part 8 ppt

... percentage of 90 is 18? First translate the problem into math: Now solve: ᎏ 10 x 0 ᎏ ϫ 90 ϭ 18 ᎏ 1 9 0 0 0 x ᎏ ϭ 18 ᎏ 1 9 0 x ᎏ ϭ 18 ᎏ 1 9 0 x ᎏ ϫ 10 ϭ 18 ϫ 10 9x ϭ 180 x ϭ 20 Answer: 18 is 20% of 90. What ... 3. Math: ᎏ 1 1 0 0 0 ᎏ ϫ 30 ϭ 3 ■ The word what refers to a variable. English: 20% of what equals 8? Math: ᎏ 1 2 0 0 0 ᎏ ϫ a ϭ 8 ■ The words is, are, and were, mean equa...

Ngày tải lên: 22/07/2014, 10:22

... triangular figure: x ϭ 8, y ϭ 4, and z ϭ 2. ᎏ 8 ϩ 4 8 ϩ 2 ᎏ ϩ ᎏ 8 ϩ 4 4 ϩ 2 ᎏ ϩ ᎏ 8 ϩ 4 2 ϩ 2 ᎏ ᎏ 1 8 4 ᎏ ϩ ᎏ 1 4 4 ᎏ ϩ ᎏ 1 2 4 ᎏ LCD is 8. ᎏ 1 8 4 ᎏ ϩ ᎏ 2 8 8 ᎏ ϩ ᎏ 5 8 6 ᎏ Add. ᎏ 9 8 8 ᎏ Simplify. ᎏ 4 4 9 ᎏ Answer: ᎏ 4 4 9 ᎏ 8 24 x zy –PROBLEM ... Ϫ n! r)! ᎏ 8 P 4 ϭ ᎏ (8 Ϫ 8! 4)! ᎏ 8 P 4 ϭ ᎏ 8 4 ! ! ᎏ 8 P 4 ϭ Cancel out the 4 ϫ 3 ϫ 2 ϫ 1 from the numerator...

Ngày tải lên: 22/07/2014, 10:22

... of sides in the polygon. The polygon above has eight sides, therefore x ϭ 8. S ϭ 180 (x Ϫ 2) ϭ 180 (8 Ϫ 2) ϭ 180 (6) ϭ 1, 080 ° Exterior Angles The sum of the exterior angles of any polygon (triangles, ... in proportion: ᎏ 2 1 0 0 ᎏ ϭ ᎏ 2 1 ᎏ ᎏ 1 9 8 ᎏ ϭ ᎏ 2 1 ᎏᎏ 8 4 ᎏ ϭ ᎏ 2 1 ᎏ ᎏ 3 1 0 5 ᎏ ϭ ᎏ 2 1 ᎏ 18 30 20 135° 75° 135° 75° 60° 9 15 10 60° 8 4 –GEOMETRY REVIEW– 1 28 Example Wha...

Ngày tải lên: 22/07/2014, 10:22

... ∠6 ϭ 8 ■ In this situation, any acute angle added to any obtuse angle is supplementary. m∠1 ϩ m∠2 ϭ 180 ° m∠2 ϩ m∠3 ϭ 180 ° m∠3 ϩ m∠4 ϭ 180 ° m∠1 ϩ m∠4 ϭ 180 ° m∠5 ϩ m∠6 ϭ 180 ° m∠6 ϩ m∠7 ϭ 180 ° m∠7 ... angles. The sum of a vertical angle and its adjacent angle is 180 °: ■ m∠1 ϩ m∠2 ϭ 180 ° ■ m∠2 ϩ m∠3 ϭ 180 ° ■ m∠3 ϩ m∠4 ϭ 180 ° ■ m∠1 ϩ m∠4 ϭ 180 ° Practice Question What is the value of b...

Ngày tải lên: 22/07/2014, 10:22

... practice essay, get more prompts from resources such as Acing the SAT 2006 (LearningExpress, 2006) or 11 Practice Tests for the New SAT (Princeton Review, 2004).  Planning Your Essay Planning takes ... in the months before the SAT. When you encounter new words, notice their con- text and look up their definitions in the dictionary. Search the Internet with the terms SAT and vocabulary....

Ngày tải lên: 22/07/2014, 10:22

... find its roots: ᎏ x 4 2 ᎏ – 3x = 8 x 2 – 12x = –32 x 2 – 12x + 32 = 0 (x – 8) (x – 4) = 0 x – 8 = 0, x = 8 x – 4 = 0, x = 4 ᎏ x 4 2 ᎏ – 3x = 8 when x is either 4 or 8. 5. d. Factor the numerator ... 9 68 = (11)(11)h, 9 68 = 121h, h = 8. The prism has two square faces and four rectangular faces. The area of one square face is 121 square units. The area of one rectangular face is (8)...

Ngày tải lên: 22/07/2014, 10:22

... c. Substitute 8 for a: ᎏ b – 8 4 ᎏ = ᎏ 4 8 b ᎏ + 1. Rewrite 1 as ᎏ 8 8 ᎏ and add it to ᎏ 4 8 b ᎏ , then cross multiply: ᎏ b – 8 4 ᎏ = ᎏ 4b 8 +8 ᎏ 4b 2 – 8b – 32 = 64 b 2 – 2b – 8 = 16 b 2 – ... 2 1 2 3 4 5 6 7 8 9 • 1 2 3 4 5 6 7 8 9 0 • / 1 2 3 4 5 6 7 8 9 0 • / 1 2 3 4 5 6 7 8 9 0 • 1 2 3 4 5 6 7 8 9 • 1 2 3 4 5 6 7 8 9 0 • / 1 2 3 4 5 6 7 8 9 0 • / 1 2 3...

Ngày tải lên: 22/07/2014, 10:22

... 2 1 2 3 4 5 6 7 8 9 • 1 2 3 4 5 6 7 8 9 0 • / 1 2 3 4 5 6 7 8 9 0 • / 1 2 3 4 5 6 7 8 9 0 • 1 2 3 4 5 6 7 8 9 • 1 2 3 4 5 6 7 8 9 0 • / 1 2 3 4 5 6 7 8 9 0 • / 1 2 3 4 5 6 7 8 9 0 • 1 2 3 4 5 6 7 8 9 • 1 2 3 4 5 6 7 8 9 0 • / 1 2 3 4 5 6 7 8 9 0 • / 1 2 3 4 5 6 7 8 9 0 • 1 2 3 4 5 6 7 8 9 • 1 2 3 4 5 6 7 8 9 0 • / 1 2 3 4 5 6 7 8 9 0 • / 1 2 3 4 5 6 7 8 9 0 • 9...

Ngày tải lên: 22/07/2014, 10:22

... x 2 Ϫ 6x ϩ 8 The answer is correct. –ALGEBRA REVIEW– 78 Practice Question If (x Ϫ 8) (x ϩ 5) ϭ 0, what are the two possible values of x? a. x ϭ 8 and x ϭϪ5 b. x ϭ 8 and x ϭ 5 c. x ϭ 8 and x ϭ 0 d. ... (x Ϫ 8) (x ϩ 5) ϭ 0, then one (or both) of the factors must equal 0. x Ϫ 8 ϭ 0 if x ϭ 8 because 8 8 ϭ 0. x ϩ 5 ϭ 0 if x ϭϪ5 because Ϫ5 ϩ 5 ϭ 0. Therefore, the two values of x t...

Ngày tải lên: 22/07/2014, 10:22