Set up the percent proportion, and write "unknown" for the value that is not given. Recall that the percent proportion is 
= 
. Do not try to solve for any unknowns.7.2% of 87 is what?
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Answer: D
Mathematics
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Solve the equation.6x + 2 = 2x - 6
A. - 
B. 2
C. -8
D. -2
Mathematics
Identify the equation without applying a rotation of axes.10x2 - 10xy + 3y2 - 3x - 3y + 4 = 0
A. parabola B. ellipse C. hyperbola D. circle
Mathematics
Simplify the expression.-52
A. Exponent: 5, base: 2 B. Exponent: 2, base: -5 C. Exponent: -2, base: 5 D. Exponent: 2, base: 5
Mathematics
Solve the problem.The voltage E in an electrical circuit is given by E = 5.7 cos 40?t, where t is time measured in seconds. Find the frequency of the function (that is, find the number of cycles or periods completed in one second).
A. 20
B. 40
C. 
D. 
Mathematics