INCOMING HS 9 TH GRADE (COMPLETED PRE-ALGEBRA)

Transcription

1 INCOMING S 9 T GRADE (COMPLETED PRE-ALGEBRA) Select the best answer. 1. Solve the system: x 2y = 7 x + 3y = 14 A ( 7, 7) C ( 7, 1) B no solution D (7, 0) 2. Solve 3y + 9 = 7 + 9y. y = 3 4 G y = 4 3 y = 3 4 J y = 3 3. There are 87 green balls and 41 red balls in a bag. If one is randomly selected, what is the probability that it will be a green ball? A B C D 4. Express 3.2% as a decimal G J 32. Which statement explains why the graph is misleading? 6. Solve 1 8 x = 18. x = 144 x = 2.2 G x = 144 J x = Changing the size but not the shape of a figure is called. A dilation B rotation 8. $7 is 20% of what amount? C reflection D translation $1 $37 G $90 J $ Repeating trials many times to try to determine the likelihood of an event is related to. A dependent events B theoretical probability C experimental probability D the undamental Counting Principle 10. What scale factor relates a 10-inch scale model to a 0-foot actual model? 1: :1 G 1:60 J 1:6 11. The sales tax is $44.7 on a TV that sells for $89. What is the sales tax rate? A 40% C % B 20% D 4.% A The hands distract from the data. B The numbers are not realistic. C Nothing is wrong with the graph. D The changes in the area of the dollar bills are greater than the changes in the amounts. Original content Copyright by olt McDougal. Additions and changes to the original content are the responsibility of the instructor. 221 olt McDougal Mathematics

2 INCOMING S 9 T GRADE (COMPLETED PRE-ALGEBRA) 12.What is the name given to a repeating pattern of figures that completely covers a plane with no gaps or overlaps? tessellation G transformation correspondence J rotational symmetry 13. Calculate the means of the x- and y-coordinates for the data: x y A 1.8; 1 C 16; 1 B ; 1 D 10.8; Express 4% as a decimal G 0.40 J is about what percent of 82? A 2% C 40% B 3% D 0% 16. Simplify G J A briefcase measures 10 inches by 4.9 inches by 13.7 inches. ind the surface area of the briefcase. Round to the nearest tenth. A in. 2 C 23.1 in. 2 B 06.3 in. 2 D 28.6 in ind the unknown number in the proportion x = x = 40 x = 4 G x = 6.2 J x = In a three-dimensional figure, an edge is where two meet. A vertices B curves C points D faces 20. ind the measure of the smaller angle. 112 G J The wheelchair ramp shown below on the left is going to be rebuilt, with the proportions staying the same. ow many feet will it rise if the new length is going to be 9 feet? A 36 ft B 4 ft C 3 ft D 2.2 ft 22. Andrea wants the area of her rectangular garden to be at least 36 square feet. If the garden is 4 feet wide, what must the length be? L 9 ft G L > 9 ft 23. Simplify ( 4). L 14 ft A 23 C 41 B 68 J L 14 ft D 18 Original content Copyright by olt McDougal. Additions and changes to the original content are the responsibility of the instructor. 222 olt McDougal Mathematics

3 INCOMING S 9 T GRADE (COMPLETED PRE-ALGEBRA) 24.Express the ratio of 11 cars to people as a fraction in lowest terms. G 1car people 11cars people J cars 1person 44 cars people 2. ind the perimeter of the parallelogram. A 168 ft B 127 ft C 12 ft D 84 ft 26. ind the average number of phone calls made by a salesperson over the past 8 hours: 8, 21, 3, 19, 27, 41, 3, G 23.2 J ind the surface area of the given figure. Use 3.14 for. A ft 2 B ft 2 C ft 2 D ft ind the value of x in the parallelogram. x = 6 G x = 90 x = 11 J x = Express ( 6x)( 6x)( 6x)( 6x) using exponents. A 6x 4 C ( 6x) 4 B 24x D ( 6x) 4 30.ind the measure of 203 G J 47 DB. 31. Claire draws a card from a deck, puts it back, and draws another card from the same deck. These two events are. A independent events B dependent events C random numbers D permutations 32. ind the value of 8 C 6. 20, G 6 J Simplify (c + 2c) 4c. A 3c B 11c C 19c D 23c 34. Choose the expression that matches the words: the sum of and the quotient of a number and n n 7 G + (7)(n) J + n 7 3. Simplify 8 (3 ). A 29 C 16 B 16 D 29 Original content Copyright by olt McDougal. Additions and changes to the original content are the responsibility of the instructor. 223 olt McDougal Mathematics

4 INCOMING S 9 T GRADE (COMPLETED PRE-ALGEBRA) 36. Choose the true statement. 3 < > Which equation is shown in the graph? G.6 > 6 J 0.8 < Solve v = 0.66v. A v = 0.61 C v = 1. B v = 0. D v = The table corresponds to a farmer tracking the growth of his crop. Week Pounds of Vegetables arvested Choose the scenario that best matches the data. The farmer harvests different amounts throughout the season. G The farmer harvests the same amount throughout the season. The farmer plants seeds and waits weeks for vegetables to grow. J The farmer picks all of his vegetables in the first few weeks. 39. Which relationship is NOT a function? A y = 6x B x = 0 C y = x D y = 7 + x y = x G y = x 41. Simplify 7 4. y = 2x J y = x A 28 C 343 B 6 D 2, What is the smallest value in the stemand-leaf plot below? Stem Leaves Key: 3 means G 20 J 2,337 Original content Copyright by olt McDougal. Additions and changes to the original content are the responsibility of the instructor. 224 olt McDougal Mathematics

5 Original content Copyright by olt McDougal. Additions and changes to the original content are the responsibility of the instructor. 321 olt McDougal Mathematics