Find the coefficient of the given term in the binomial expansion.x6y4 term, (x + y)10
A. 210
B. 25,200
C. 6
D. 151,200
Answer: A
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Solve the problem.In a Psychology class, the students were tested at the end of the course on a final exam. Then they were retested with an equivalent test at subsequent time intervals. Their average scores after t months are given in the table.
Using a graphing utility, fit a logarithmic function y = a + b ln x to the data. Using the function you found, estimate how long will it take for the test scores to fall below 84%. Express your answer to the nearest month.
A. 20 months B. 8 months C. 10 months D. 12 months
Express the verbal representation for the function f graphically.Multiply the input x by 3 and then subtract 4 to obtain the output y.
A. 
B. 
C. 
D. 
Solve the problem.Assume that there is a linear relationship between scores achieved on an unspecified standardized test and family income. Suppose the score for a test is 485 when the family income is $25,000 and is 525 when the family income is $55,000. Let x be the income and y be the score of the test. (a) Find the equation of the line that describes the relationship. Write your answer in slope-intercept form. (b) Use your equation from part (a) to estimate the score if the family income is $40,000.
A. (a) y = 
x + 
; (b) 525
B. (a) y = 
x + 
; (b) 565
C. (a) y = 
x + 
; (b) 505
D. (a) y = 2x + 
; (b) 545
Solve.Jeff started playing quarterback for his college team last season. Last season, he completed 247 passes of 411 passes attempted. This season, he completed 250 passes of 424 passes attempted. Use cross products to determine whether the completion rate for last season is the same as the completion rate for this season.
A. Yes B. No