Write the statement in symbolic form.The set of natural numbers is a subset of the integers.
A. N ? Z
B. N ? I
C. N ? I
D. N ? Z
Answer: A
Mathematics
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Find the weighted mean. Round to the nearest tenth.
A. 7.2 B. 23.6 C. 26.0 D. 22.3
Mathematics
Solve by the quadratic formula. If there are no real roots, say so.x2 = 7 - 4x
A. -2 ± 
B. -2 ± 2
C. 2 + 
D. -1 ± 
Mathematics
Solve the problem.A company manufactures two types of lawn mowers, a gas-powered model and an electric model. The company's production plan calls for the production of at least 940 mowers per month. Write the inequality that describes the production plan, if x represents the number of gas-powered mowers and y represents the number of electric mowers.
A. x - y ? 940 B. x + y ? 940 C. x - y ? 940 D. x + y ? 940
Mathematics
Convert the units.167 g = 
kg
A. 0.0167 kg B. 16,700 kg C. 0.167 kg D. 167,000 kg
Mathematics