Use the indicated row operation to change the matrix.Replace R2 by 
R1 + 
R2.
A. 
B. 
C. 
D. 
Answer: C
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Simplify the expression. Express the answer so that all exponents are positive. Whenever an exponent is 0 or negative, we assume that the base is not 0.(2xy)2
A. 4x2y2
B. 2x2y2
C. 4xy
D. 
Provide an appropriate response.In a biology class, the following test scores were recorded for a student: 75, 67, 63, 63, 75, 77. Find the mean, median, and mode.
A. mean: 71, median: 70, mode: 75 B. mean: 70, median: 71, mode: 63 and 75 C. mean: 71, median: 71, mode: 63 D. mean: 70, median: 63, mode: 77
Solve. Assume the exercise describes a linear relationship.In 2005, John invested $30,000 in the stock market. By 2011 his investment had grown to $32,300. Find an equation relating time and the value of the investment. If the market continues to grow at the same rate, how much will be in his account in 2018? Give your answer to the nearest dollar.
A. $32,301 B. $32,684 C. $34,983 D. $34,600
Identify the polynomial as a monomial, binomial or trinomial.13x + 2
A. Monomial B. Trinomial C. Binomial