Find the value of the expression using the given values.
+ 
x = -9, y = -4
A. 97
B. -5
C. 5
D. 13
Answer: D
Mathematics
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Find the db gain of an amplifier whose input voltage is 1.2 volts and whose output voltage is 19 volts. Round to two decimal places, if necessary. ?
A. 1.2 db B. 55.24 db C. 23.99 db D. -55.24 db E. 3 db
Mathematics
Determine the degree of the polynomial.6a2 + 13a5 - 8a
A. 5 B. 8 C. 7 D. 3
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Solve the quadratic equation using the square root property. Express imaginary solutions in a + bi form.(x + 7)2 = -147
A. {7 ± 7i
}
B. {-7 ± 7
}
C. {-7 ± 7
}
D. {-7 ± 7i
}
Mathematics
Find the circle's circumference or area, as requested. Use 3.14 as the approximate value of ?, and round your answer to the nearest tenth.Find the circumference.
A. 113.0 cm B. 18.8 cm C. 37.7 cm D. 7.6 cm
Mathematics