Solve the pair of linear equations by addition.
If there is one common solution, select the correct ordered pair of the point of intersection. If there is no one common solution, select either parallel or coincide for the correct answer.
A. 
B. 
C. 
D. The lines are parallel.
E. The lines coincide.
Answer: A
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Find those values of x for which the given function is increasing and those values of x for which it is decreasing.y = 27x - x3
A. Increasing for x < -3, x > 3, decreasing for -3 < x < 3 B. Increasing for -9 < x < 9, decreasing for x < -9, x > 9 C. Increasing for -3 < x < 3, decreasing for x < -3, x > 3 D. Increasing for x < 3, decreasing for x > 3
Provide an appropriate response.The diagonals of a 
intersect at their common midpoint.
A. trapezoid B. pentagon C. parallelogram D. rhombus
Solve the problem.Two angles are complementary if their sum is 90°. If the measure of the first angle is x°, and the measure of the second angle is (3x - 2)°, find the measure of each angle.
A. 1st angle = 31°; 2nd angle = 59° B. 1st angle = 22°; 2nd angle = 68° C. 1st angle = 22°; 2nd angle = 64° D. 1st angle = 23°; 2nd angle = 67°
Solve the problem.The surface area of a balloon is given by S(r) = 4?r2, where r is the radius of the balloon. If the radius is increasing with time t, as the balloon is being blown up, according to the formula 
find the surface area S as a function of the time t.
A. S(r(t)) = 
?t6
B. S(r(t)) = 
?t9
C. S(r(t)) = 
?t3
D. S(r(t)) = 
?t6