Rationalize the denominator. Assume that all variables represent positive real numbers.
A. 28
B. 3a
C. 
D. 
Answer: C
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Write the function without radicals by using fractional exponents.y = 
- 
A. y = x2/3 - (7x)1/2 B. y = x2/3 - 7x1/2 C. y = x3/2 - 7x1/2 D. y = x1/3 - (7x)1/2
Find a parametric equation of the indicated ellipse.Foci: (4,1) and(4,-5); length of major axis: 10
A. x = 4 cos t - 4, y = 5 sin t + 2 B. x = 5 cos t + 4, y = 4 sin t - 2 C. x = 4 cos t + 4, y = 5 sin t - 2 D. x = 5 cos t - 4, y = 4 sin t + 2
Solve.The weight that a horizontal beam can support varies inversely as the length of the beam. Suppose that a 2-m beam can support 770 kg. How many kilograms can a 5-m beam support?
A. 0.013 kg B. 77 kg C. 308 kg D. 0.0032 kg
Solve the equation using the multiplication property of equality.9x + 15x = 16
A. {384}
B. 
C. {-8}
D. 