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

... 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