Choose the equation that matches the graph.
A. 4y2 - 25x2 = 100
B. 25x2 - 4y2 = 100
C. 25x2 + 4y2 = 100
D. 4x2 - 25y2 = 100
Answer: B
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Solve the initial value problem.Differential Equation: 
= 9t2i - tj Initial Conditions: 
= -10i, r(0) = 7i - 6k
A. r(t) = 
i - 
j - 6k
B. r(t) = 
i + 
j - 6k
C. r(t) = 
i - 
j - 6k
D. r(t) = 
i - 
j - 6k
Perform the indicated operation and simplify.
+ 
A. 
B. 
C. 
D. 
Solve.The area of the playing surface of the tennis court shown is 
square feet. If its width is 
feet, find its length.
A. (-24x + 3) feet B. (6x + 3) feet C. (36x2 + 138x + 24) feet D. (6x - 3) feet
Sketch the graph of the quadratic function. Give the vertex and axis of symmetry.f(x) = x2 - 2x - 8
A. vertex (- 1, - 9); axis of symmetry x = - 1
B. vertex (- 1, - 9); axis of symmetry x = - 1
C. vertex (1, - 9); axis of symmetry x = 1
D. vertex (1, - 9); axis of symmetry x = 1