Describe the given set of points with a single equation or with a pair of equations.The plane through the point (10, -5, -7) and parallel to the xy-plane
A. x = 10 and y = -5
B. x + y - 7 = 0
C. x + y = 5
D. z = -7
Answer: D
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Solve the system of equations by the substitution method.
A. (-6, 6) B. (-7, 7) C. (7, -7) D. no solution
Find the length of the unknown side of a right triangle with legs a and b and hypotenuse c. Round to the nearest thousandth, if necessary.a = 4, b = 5
A. c = 20 B. c = 9 C. c = 6.403 D. c = 4.243
Solve the problem.A marina owner wishes to estimate a linear function that relates boat length in feet and its draft (depth of boat below water line) in feet. He collects the following data. Let boat length represent the independent variable and draft represent the dependent variable. Use a graphing utility to draw a scatter diagram and to find the line of best fit. What is the draft for a boat 60 ft in length (to the nearest tenth)? 
A. 10.5 B. 9.7 C. 10.3 D. 15.7
Find the value of the determinant.
A. 9 B. 3 C. -11 D. -9