Find the least common denominator.
and 
A. r(r + 3)
B. (r + 3)2
C. r(r + 1)(r + 3)
D. r(r + 3)2
Answer: D
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Write the converse, inverse, or contrapositive off the proposition, as indicated.If the alarm beeps every thirty seconds, then you have to replace the battery. (converse)
A. If you do not have to replace the battery, then the alarm does not beep every thirty seconds. B. If you have to replace the battery, then the alarm does not beep every thirty seconds. C. If you have to replace the battery, then the alarm beeps every thirty seconds. D. If the alarm does not beep every thirty seconds, then you do not have to replace the battery.
Solve the problem.A fire watch tower is to be constructed to provide a view in all directions of a distance of 
Its location is 
east and 
south of the ranger station. Using the ranger station as the origin, write an equation for the circle that bounds the viewing area.
A. (x + 11)2 + (y - 17)2 = 2500 B. (x - 11)2 - (y - 17)2 = 2500 C. (x - 11)2 + (y + 17)2 = 2500 D. (x - 11)2 + (y - 17)2 = 2500
Simplify. 62 + 42 ÷ 22
A. 13 B. 25 C. 56 D. 40
Write the whole number in standard form.8000 + 70
A. 80,700 B. 70,800 C. 8070 D. 7080