Rationalize the denominator. Assume that all variables represent positive real numbers.
A. 
B. 
C. 
D. 
Answer: C
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Solve the proportion.
= 
A. 20
B. 
C. 
D. 
Solve the problem.A projectile is fired from a cliff 400 feet above the water at an inclination of 45° to the horizontal, with a muzzle velocity of 350 feet per second. The height h of the projectile above the water is given by 
where x is the horizontal distance of the projectile from the base of the cliff. How far from the base of the cliff is the height of the projectile a maximum?
A. 1914.06 ft B. 957.03 ft C. 3271.09 ft D. 1357.03 ft
Find the unknown length in the right triangle. If necessary, approximate the length to the nearest thousandth.
A. 9.434 cm B. 7.681 cm C. 6.245 cm D. 13 cm
Simplify by combining like terms.5y + 2xy - 5x - 2y + 8x
A. 3x - 3y + 2xy B. - 3x + 3y - 2xy C. 3x + 7y + 2xy D. 3x + 3y + 2xy