Solve the equation and express the solution in exact form.log2 x2 = (log2 x)2
A. {0, 2}
B. {4}
C. {1, 4}
D. {1, 2}
Answer: C
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Solve the problem.A merchant has coffee worth $4 a pound that she wishes to mix with 7 pounds of coffee worth $7 a pound to get a mixture that can be sold for $5 a pound. How many pounds of the $4 coffee should be used?
A. 7 lb B. 14 lb C. 21 lb D. 10.5 lb
Solve the problem.In a local election, 47,600 people voted. This was an increase of 15% over the last election. How many people voted in the last election?
A. 40,460 people B. 41,391 people C. 54,740 people D. 56,000 people
Write the vector v in the form v1i + v2j, given 
and the angle ? that v makes with the positive x-axis.
= 15, ? = 225°
A. - 
i - 
j
B. i - 
j
C. 
i j
D. - 
i + j
Write the equation of the function in the form f(x) = ax2 + bx + c.|
|
A. f(x) = -2x2 - 8x - 5 B. f(x) = -2x2 + 8x + 5 C. f(x) = 2x2 - 16x + 5 D. f(x) = 2x2 + 8x + 5