Classify the following statement as true or false.If a quadrilateral is a parallelogram, it must also be a rectangle.
A. True
B. False
Answer: B
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Use the rules for exponents to rewrite the expression and then evaluate the new expression. 
A. 0 B. -12 C. 1 D. -4
Decide which of the 5 properties of a commutative group (closure, identity, inverse, associative, commutative) hold for the given system.
A. Closure, identity, associative, and commutative only B. Closure, identity, inverse, and commutative only C. Closure, identity, inverse, and associative only D. All of them
Simplify by combining like terms.3x + 3y - 5x + 6y
A. 9x - 2y B. 3x - 5x + 3y + 6y C. 7xy D. -2x + 9y
The Ehrenberg equation 
gives the relationship between the height (in meters) and the average weight W (in kilograms) for children between 5 and 13 years of age.
?
What is the average weight of a 10-year-old child who stands at 1.4 m tall? Round the answer to the nearest tenth. Use differentials to estimate the change in the average weight of a 10-year-old child whose height increases from 1.4 m to 1.45 m.
?
A. 44.8 kg, 3.2 kg B. 83.9 kg, 2.9 kg C. 58.0 kg, 1.6 kg D. 31.5 kg, 1.6 kg E. 31.5 kg, 2.9 kg