Write out the sum.
A. 4n + 4
B. 1 + 2 + 3 + ... + n
C. 4 +8 + 12 + ... + (4n + 4)
D. 8 + 12 + 16 + ... + (4n + 4)
Answer: D
Mathematics
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Find the marginal cost when 45 radios are produced.
A. -$895 B. $895 C. $38 D. $2
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Perform the addition. Express your answer in simplest form.
+ 
A. 
B. 
C. 
D. 
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Add or subtract.5.9 + 8 + 9.7
A. 22.6 B. 23.4 C. 23.6 D. 22.4
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Solve the equation.2-x = 
A. 
B. {4}
C. 
D. {-4}
Mathematics