Find the sum or difference. Write the answer in standard form, a + bi.[(7 + 5i) - (5 + 5i)] + (7 + 2i)
A. -5 - 2i
B. 9 + 2i
C. 9 + 12i
D. -5 + 2i
Answer: B
Mathematics
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Find the standard-form equation of the ellipse centered at the origin and satisfying the given conditions.An ellipse with y-intercepts ±8; foci at 
and 
.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics
Identify the equation as representing either a circle, a parabola, an ellipse, or a hyperbola.2.9y2 + 3x - 5y = 3.2
A. Ellipse B. Parabola C. Circle D. Hyperbola
Mathematics
Solve.Doctor Jim has the following aged patients at his clinic: 18, 3, 24, 18. What is the average age of his patients?
A. 16 B. 15 C. 24 D. 3
Mathematics
Find the exact value of the indicated trigonometric function of the angle ? in the figure. Rationalize the denominator where necessary.Find sin ?.
A. 
B. 
C. 
D. 
Mathematics