Solve the equation.4-x = 
A. {-2}
B. {2}
C. 
D. 
Answer: B
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Solve the problem. Round your answer to 2 decimal places when necessary.In a given year, the population of a certain country is about 159 million. The overall birth rate is 15.8 births per 1000. The overall death rate is 10.8 deaths per 1000. If the population of the country increased by 1.04 million, what is the approximate net immigration to the country during this year?
A. 2 million B. 24,500 C. 245,000 D. 2613 million
Find the cardinal number for the set.D = {seven}
A. 0 B. 7 C. 5 D. 1
Divide the polynomial by the monomial.
A. 2x4 + 3x B. 2x3 + 3 C. 20x4 + 3x D. 2x4 + 30x
Provide an appropriate response.The end of a 30 mm-diameter round rod is milled as shown in the given figure. Find the area of the square. 
A. 900 mm2 B. 450 mm2 C. 225 mm2 D. Insufficient information.