AccelePrep for the ACT Test 2nd Edition Student Text

C HAPTER 6 | T RY I T O UT ! M ATH P RACTICE • 127

29. If the average (arithmetic mean) of a , b , and c is z , which of the following is the average of a , b , c and d ? A. z d 3 B. z d 4 C. z d 3 3 D. z d 4 3 E. ( ) z d 4 3 30. If x – y = 7 and x y 35 2 2 , what is x y ? F. 5 G. 7 H. 10 J. 28 K. 42

27.  –Š‡ ϐ‹‰—”‡ „‡Ž‘™ǡ ™Šƒ– ‹• –Š‡ Ž‡‰–Š ‘ˆ AC ? sin ABD 4 7 + e o

A. 5 B. 2 7 C. 4 3 D. 7 E. 10

28. ‘› Šƒ• „Ž—‡ǡ ‰”‡‡ǡ ƒ† ”‡† ƒ”„Ž‡•Ǥ Š‡ number of blue marbles and green marbles …‘„‹‡† –‘–ƒŽ ʹͷǤ Š‡ —„‡” ‘ˆ „Ž—‡ ƒ† ”‡† ƒ”„Ž‡•…‘„‹‡† –‘–ƒŽ ͵ͲǤ Š‡”‡ ƒ”‡ –™‹…‡ ƒ• many red marbles as green marbles. How many ‰”‡‡ ƒ”„Ž‡• †‘‡• ‘› Šƒ˜‡ǫ F. 5 G. 10 H. 15 J. 20 K. 25