Solve the problem.Using a phone card to make a long distance call costs a flat fee of $0.81 plus $0.16 per minute starting with the first minute. Find the total cost of a phone call which lasts 27 minutes.
A. $27.13
B. $5.13
C. $4.32
D. $22.03
Answer: B
Mathematics
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Solve the equation.5(x + 5) = 20
A. -1 B. -9 C. 1 D. 9
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Multiply.(-9)(-16)
A. 1440 B. 153 C. -144 D. 144
Mathematics
Provide an appropriate response.Perform the indicated operations: 8 ÷ 
× 
× 5 ÷ 10
A. -10 B. 0.016 C. 10 D. 40
Mathematics
Find the exact value of the expression.cos 40° cos 20° - sin 40° sin 20°
A. 
B. 
C. 
D. 
Mathematics