At the given point, find the slope of the curve or the line that is tangent to the curve, as requested.6x2y - ? cos y = 7?, tangent at (1, ?)
A. y = - 
x + 
B. y = ?x
C. y = -2?x + 3?
D. y = -2?x + ?
Answer: C
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Solve.How much 12% alcohol solution should be mixed with a 4% alcohol solution to get 30 liters of 8% alcohol solution?
A. 15 L of 12%, 15 L of 4% B. 18 L of 12%, 12 L of 4% C. 20 L of 12%, 10 L of 4% D. 9 L of 12%, 21 L of 4%
Determine if the graph of the function is concave up or concave down.y = -x2 + 1
A. Concave up B. Concave down
Determine the slope and the y-intercept for the linear equation. Use the slope and the y-intercept to sketch the graph of the equation.y = 7x + 5
A. m = 5, y-intercept: (0, 7)
B. m = -7, y-intercept: (0, -5)
C. m = 7, y-intercept: (0, 5)
D. m = -5, y-intercept: (0, -7)
Solve the problem.Let the distance from home in miles of a person after t hours on a straight path be given by 
Approximate the average rate of change of s from 
to 
to the nearest tenth and interpret the result.
A. about 2.4; average speed is about 2.4 mi/hr B. about 0.7; average speed is about 0.7 mi/hr C. about 3.9; average speed is about 3.9 mi/hr D. about 2.9; average speed is about 2.9 mi/hr