Solve the problem.Peter must practice the piano 6
hours per week. He has already practiced 2
hours. How many more hours does he need to practice?
A. 2
hr
B. 4
hr
C. 3
hr
D. 3 hr
Answer: C
Mathematics
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Rationalize the denominator and simplify. Assume that all variables represent positive real numbers.
A. 
B. 
C. 
D. 
Mathematics
Find the given value.Find (f - g)(2) when f(x) = -2x2 - 7 and g(x) = x + 7.
A. -24 B. -20 C. 13 D. -10
Mathematics
You are holding one of the tethers attached to the top of a giant character balloon in a parade. Before the start of the parade the balloon is upright and the bottom is floating approximately 20 feet above ground level. You are standing approximately a = 130 feet ahead of the balloon (see figure).
?
?
Find an expression for the angle of elevation from you to the top of the balloon.
?
A. 
B. 
C. 
D. 
E. 
Mathematics
Solve the equation.-10y + 7 = -5 - 10y
A. 5 B. all real numbers C. no solution D. 0
Mathematics