tailieunhanh - Solve prpblem sat 10

Tham khảo tài liệu 'solve prpblem sat 10', ngoại ngữ, anh ngữ phổ thông phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | THE SAT MATH SECTION Answer Key Section 1 Answers 1. e. Divide the numerator and denominator ofx by x leaving J. Divide the numerator and denominator of by 5. This fraction is also equal to 4. 2. c. Multiply the numbers of vocalists guitarists drummers and bassists in each town to find the number of bands that can be formed in each town. There are 7 4 4 2 224 bands that can be formed in Glen Oak. There are 5 8 2 3 240 bands that can be formed in Belmont 240 - 224 16 more bands that can be formed in Belmont. 3. a. The equation of a parabola with its turning point five units to the right of the y-axis is written as y x - 5 2. The equation of a parabola with its turning point four units below the x-axis is written as y x2 - 4. Therefore the equation of a parabola with its vertex at 5 -4 is y x - 5 2 - 4. 4. d. If b3 -64 then taking the cube root of both sides b -4. Substitute -4 for b in the second equation b2 - 3b - 4 -4 2 - 3 -4 - 4 16 12 - 4 24. 5. e. The point that represents a number of eggs found that is greater than the number of minutes that has elapsed is the point that has a y value that is greater than its x value. Only point E lies farther from the horizontal axis than it lies from the vertical axis. At point E more eggs have been found than the number of minutes that has elapsed. 6. c. The midpoint of a line is equal to the average of the x-coordinates and the average of the y-coordinates of the endpoints of the line. The midpoint of the line with endpoints at 6 0 and 6 6 0 -6 12 6x 6 -6 is 2 2 2 -2 6 -3 . 7. a. The number of yellow marbles 24 is -J- 3 times larger than the number of marbles given in the ratio. Multiply each number in the ratio by 3 to find the number of each color of marbles. There are 3 3 9 red marbles and 4 3 12 blue marbles. The total number of marbles in the sack is 24 9 12 45. x2 36 . a. The equation y x2- 9x_ 36 is undefined when its denominator x2 - 9x - 36 evaluates to zero. The x values that make the denominator evaluate to zero