My teacher provided me with a practice test for an upcoming exam, and he is not
ID: 3100109 • Letter: M
Question
My teacher provided me with a practice test for an upcoming exam, and he is not going to provide us with the answers to it. I did most of the practice test, but I want to be sure I did them right.
My answers:
7) A
8) A
9) A
11) Unsure
12) Unsure
13) B
14) D
7) log4(x2/y6)
a) 2log4x- 6log4y b) (1/3)log4(x/y) c) 2log4x+ 6log4y d) 6log4y-2log4x
8) 4logbm-logbn
a) logb(m^4/n) b) logbm4/logbn c) logb(4m/n) d) logb(m^4-n)
9) log623.57
a) 1.764 b) 3.928 c) 0.567 d) 1.372
11) 32x+ 3x-6=0
a) (ln3/ln2) b) (ln2/ln3) c) ln2/ln6) d) (ln6)
12) ex= -x
a) -0.57 b) -1.05 c) 0.57 d) 1.05
13) Solve system of equation by substitution
x+7y=-2
3x+y=34
a) x=7, y=12; (7,12) b) x=12, y=-2; (12,-2) c) x=-2, y=3; (-2,3) d) x=3, y=7; (3,7)
14) Solve system of equations by elimination
5x-2y=-1
x+4y=35
a) x=3, y=9; (3,9) b) x=2, y=8; (2,8) c) x=2, y=9; (2,9) d) x=3, y=8; (3,8)
Explanation / Answer
the 7,8,9, are correct. 11 is ln2/ln 3 which is (b) 12 is a) which is solved by a calulator 13 is correct 14 is correct!
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