Perform the indicated operation.Subtract (-5x2 - 3x + 2) from (-x2 - 7x + 5).
A. 4x2 + 4x + 3
B. 6x2 - 4x + 7
C. 4x2 - 4x + 3
D. -6x2 - 10x + 7
Answer: C
Mathematics
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Express the interval in set builder notation and graph the interval on a number line.(-?, -3]
A. {x 
}
B. {x 
}
C. {x 
}
D. {x 
}
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Multiply.0.06 × 0.08
A. 0.0048 B. 0.48 C. 0.000048 D. 0.048
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Solve the formula for the indicated variable.F = 
C + 32 for C
A. C = 
B. C = 
(F - 32)
C. C = 
(F - 32)
D. C = 
Mathematics
There are 5 black keys in one piano octave. How many different 4-keys chords can be played on the synthesizer of 2 octaves, using only black keys?
a. 210 b. 140,792,940,288,000 c. 151,200 d. 840
Mathematics