Evaluate the expression.[[-18]]
A. -19
B. -17
C. -18
D. 18
Answer: C
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Solve the system of equations by the substitution method. If the system does not have a single ordered pair as a solution, state whether the system is inconsistent or dependent.5x + 6y = 12 3x + 2y = 4
A. (0, 3) B. No solution; inconsistent C. (0, 2) D. (-1, 3)
Change the base ten number to a number in the base indicated.Write 2874 in base nine.
A. 38439 B. 34839 C. 35489 D. 31939
Solve the problem.The path of a projectile fired at an inclination ? (in degrees) to the horizontal with an initial speed v0 is a parabola. The range R of the projectile, that is, the horizontal distance that the projectile travels, is found by using the formula R = 
sin(2?)where g is the acceleration due to gravity. The maximum height H of the projectile is H = 
(1 - cos(2?))Find the range R and the maximum height H in terms of g if the projectile is fired with an initial speed of 200 meters per second at an angle of 15° and then at an angle of 22.5°. Do not use a
calculator, but simplify the answers. What will be an ideal response?
Rewrite the expression as a single trigonometric function using a double-angle identity.cos24? - sin24?
A. 2 sin 4?
B. cos 8?
C. 
sin 16?
D. cos 4?