Clear fractions then solve by substitution.
x + 
y = 5 x - y = -6
A. {(-2, 9)}
B. {(2, 8)}
C. ?
D. {(1, 9)}
Answer: B
Mathematics
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Find the values of x for which the geometric series converges.
A. - 
< x < 
B. - 
< x < 0
C. 0 < x < 
D. 0 < x < 
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Solve the problem.Conservationists tagged 140 black-nosed rabbits in a national forest in 1990. In 1992, they tagged 280 black-nosed rabbits in the same range. If the rabbit population follows the exponential law, how many rabbits will be in the range 6 years from 1990?
A. 353 B. 176 C. 2240 D. 1120
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Graph the equation.2x + 3y - 10 = 0
A. 
B. 
C. 
D. 
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Combine like terms whenever possible. Write the result with descending powers.-3y5 + 7y4
A. 4y9 B. 4y5 C. Cannot be simplified D. 4y4
Mathematics