Find the indicated term.If a1 = 8 and d = -5, find a8.
A. -27
B. 48
C. -32
D. 43
Answer: A
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 vertices (0, ±9) and foci at 
.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics
Solve the problem.It costs $23 per hour plus a flat fee of $28 for a plumber to make a house call. What is an equation of the form 
for this situation?
A. y = 28x + 23 B. y = 23x C. y = 23x + 28 D. y = 28x
Mathematics
Divide the polynomial by the monomial.
A. 2x + 4 - 
B. 2x - 9
C. 8x + 16 - 
D. 2x2 + 4x - 
Mathematics
Find the simplest form of a second-order homogeneous linear differential equation that has the given solution.y = c1 cos 2x + c2 sin 2x
A. D2y + 4Dy + 4y = 0 B. D2y + 4y = 0 C. D2y - 4y = 0 D. D2y - 4Dy + 4y = 0
Mathematics