Simplify the expression. Assume that all variables represent non-negative real numbers.6x
- 3
- 
A. 14x
B. x2
(15 - x2)
C. 
(15x - x2)
D. 6x
- 3x2
- x4
Answer: C
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Solve the problem.A rectangular field is to be enclosed on four sides with a fence. Fencing costs $4 per foot for two opposite sides, and $2 per foot for the other two sides. Find the dimensions of the field of area 800 ft2 that would be the cheapest to enclose.
A. 56.6 ft @ $4 by 14.1 ft @ $2 B. 20 ft @ $4 by 40 ft @ $2 C. 40 ft @ $4 by 20 ft @ $2 D. 14.1 ft @ $4 by 56.6 ft @ $2
The area of a rectangle is 54 square centimeters, and its perimeter is 30 centimeters. Find the dimensions of the rectangle. ? Please enter your answer as two numbers without the units, separated by a comma.
What will be an ideal response?
Evaluate the radical expression if it is a real number. Use a calculator to approximate irrational numbers to the nearest hundredth. If the expression is not a real number, so state.-
A. -2 B. -32 C. 2 D. not a real number
Find the length of the arc on the circle of radius r meters intercepted by a central angle ?. Round your answer to three decimal places.r = 5, ? = 35°
A. 3.054 m B. 2.749 m C. 3.359 m D. 2.443 m