SAT math essentials part 9 ppt

... SOLVING– 155 ᎏ 3 4 ᎏ ϭ ᎏ 9 r ᎏ This proportion means that 3 parts peanuts to 4 parts raisins must equal 9 parts peanuts to r parts raisins. We can solve for r by finding cross products: ᎏ 3 4 ᎏ ϭ ᎏ 9 r ᎏ 3r ϭ 4 ϫ 9 3r ... there are 6 parts red paint, 4 parts green paint, and 2 parts yellow paint. Now we must first determine how many total parts there are in the ratio: 6 parts red ϩ 4 pa...

Ngày tải lên: 22/07/2014, 10:22

... 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 ϫ 5 ϫ 5 ϭ 15 ϫ 5 ϭ 75 Answer choice c: 2 ϫ 5 ϫ 9 ϭ 10 ϫ 9 ϭ 90 Answer choice d: 3 ϫ 5 ϫ 9 ϭ 15 ϫ 9 ϭ 135 Answer choice e: 5 ϫ 5 ϫ 9 ϭ 25 ϫ 9 ϭ 225 Answer cho...

Ngày tải lên: 22/07/2014, 10:22

... Opposite/Adjacent Although trigonometry is tested on the SAT, all SAT trigonometry questions can also be solved using geom- etry (such as rules of 45-45 -90 and 30-60 -90 triangles), so knowledge of trigonometry ... at 90 °. Therefore, ΔABC is a right triangle. Because one angle is 90 ° and another angle is 30°, then the third angle must be 60°. The triangle is therefore a 30-60 -90 tria...

Ngày tải lên: 22/07/2014, 10:22

... greater than 90 °. Therefore, if 90 ° ϩ 90 ° ϭ 180°, then the sum of m∠A and m∠B must be greater than 180°. Complementary Angles Two angles are complementary if the sum of their measures is 90 °. Supplementary ... complementary angles, which means the sum of the angles equals 90 °. If one of the angles is 38°, then the other angle is (90 ° Ϫ 38°). Therefore, y° ϭ 90 ° Ϫ 38° ϭ 52°, so y...

Ngày tải lên: 22/07/2014, 10:22

... with Einstein that genius is 1% inspiration and 99 % per- spiration?” becomes “Although hard work is often essential, I disagree with Einstein that it’s 99 % of what it takes to be a genius; plenty ... 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. Yo...

Ngày tải lên: 22/07/2014, 10:22

... number of guppies, g + 9, is equal to ᎏ 5 4 ᎏ p: g + 9 = ᎏ 5 4 ᎏ p. Substitute the value of g in terms of p from the first equation: ᎏ 4 5 ᎏ p + 9 = ᎏ 5 4 ᎏ p ,9 = ᎏ 2 9 0 ᎏ p, p = 20. There ... customers. Now that you’ve purchased LearningExpress’s SAT Math Essentials, you have FREE access to: ■ Practice exercises modeled on actual SAT Math questions ■ Immediate scoring a...

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 •...

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 •...

Ngày tải lên: 22/07/2014, 10:22

... ϩ 9 The product of the last pair of terms equals 9. There are a few possibilities for these terms: 3 and 3 (because 3 ϫ 3 ϭ 9) , Ϫ3 and Ϫ3 (because Ϫ3 ϫϪ3 ϭ 9) , 9 and 1 (because 9 ϫ 1 ϭ 9) , 9 ... ϭ 9x ϩ 3, which of the following is equal to f(4b)? a. 36b ϩ 12b b. 36b ϩ 12 c. 36b ϩ 3 d. ᎏ 4b 9 ϩ 3 ᎏ e. ᎏ 9 4 ϩ b 3 ᎏ Answer c. If f(x) ϭ 9x ϩ 3, then, for f(4b), 4b simply replaces x...

Ngày tải lên: 22/07/2014, 10:22