Solve the problem.A student earned scores of 85, 83, 90, 94, 88, and 84 on the first six tests in a biology class. What score is needed on the seventh test to result in an average score of 86?
A. 79
B. 81
C. 78
D. 80
Answer: C
Mathematics
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Determine the logarithm in base 10 of the given number to four decimal places.16.787-2
A. 2.4499 B. -5.6412 C. -8.1385 D. -2.4499
Mathematics
Find an equation of the line with the given properties. Express your answer in slope-intercept form. Graph the lines.Passing through (-9, 3) and perpendicular to 9x + 4y = 54
A. y = 
x + 7
B. y = - 
x + 3
C. y = - 
x + 7
D. y = - 
x + 54
Mathematics
Find the perimeter of the figure.
A. 1068 feet B. 826 feet C. 922 feet D. 413 feet
Mathematics
Give all solutions of the nonlinear system of equations, including those with nonreal complex components.2x2 - 2y2 = 102x2 + 4y2 = 34
A. {(-3, -2), (-2, -3)} B. {(3, -2), (3, 2)} C. {(3, 2), (-3, 2), (3, -2), (-3, -2)} D. {(3, 2), (2, 3), (-3, -2), (-2, -3)}
Mathematics