Use the definition of equality of complex numbers to find the real numbers x and y such that the equation is true.7 + xi = y + 4i
A. x = 7, y = 3
B. x = 7, y = 4
C. x = 4, y = 7
D. x = 3, y = 7
Answer: C
Mathematics
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Find the equation of the line that has the given properties. Write the equation in slope-intercept form, if possible. Contains (3, 6); perpendicular to the line y = -9
A. y = 6 B. x = 6 C. y = 3 D. x = 3
Mathematics
Find the perimeter.
A. 51 cm B. 58 cm C. 41 cm D. 45 cm
Mathematics
Find all numbers for which the rational expression is not defined.
A. y = 3 B. y = 7 and y = -7 C. y = 49 D. y = 7
Mathematics
Use the data to complete the table.The following is the number of bonus points that 24 students have received for extra work. 
A. Frequency: 3, 5, 4, 6, 4, 2 B. Frequency: 3, 5, 3, 8, 3, 2 C. Frequency: 3, 5, 4, 7, 3, 2 D. Frequency: 3, 4, 5, 7, 3, 2
Mathematics