Simplify. Combine like terms if possible.-6n2 - (-2n2)
A. -4n4
B. -4n2
C. 4n2
D. -8n2
Answer: B
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Find the indicated measure of central tendency.The speeds (in mi/h) of the cars passing a certain checkpoint are measured by radar. The results are shown below. Find the mode of the given data.42.8?41.3?42.6?40.6?40.840.8?41.3?41.1?42.8?40.642.8?41.1?40.6?40.9?41.344.9?44.9?42.6?40.3?42.8
A. 42.8, 40.6, 41.3 B. 41.57 C. 42.8 D. 41.3
Solve the problem.The vertical displacement y (in cm) of the end of an industrial robot arm for each cycle is 
where t is the time (in s). Find the vertical velocity for 
A. 3.0 cm/s B. 17 cm/s C. 2.4 cm/s D. 16 cm/s
Solve.The voltage across a resistor is jointly proportional to the resistance of the resistor and the current flowing through the resistor. If the voltage across a resistor is 
for a resistor whose resistance is 
and when the current flowing through the resistor is 
find the voltage across a resistor whose resistance is 
and when the
current flowing through the resistor is 
A. 21 volts
B. 56 volts
C. 40 volts
D. 35 volts
Use half-angle identities to find the exact value of the expression.sin (-112.5°)
A. - 
B. - 
C. 
D. 
