Solve the system. +  +  = - 1 -  +  = - -17.0px;" /> +  +  = - 1



A.
B. {(1, -3, -3)}
C. {(-1, 3, 3)}
D. {(-1, 3, -3)}

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Answer: D

Mathematics

Identify the type of surface represented by the given equation. y2 + z2 = 7 

A.

Compute the average rate of change of f from x1 to x2. Round your answer to two decimal places whenappropriate. Interpret your result graphically.f(x) = -3x + 4, x1= -5 and x2= -2

A. -3; the slope of the line passing through (-5, f(-5)) and (-2, f(-2)) is -3. B. 3; the slope of the line passing through (-5, f(-5)) and (-2, f(-2)) is 3. C. -4; the slope of the line passing through (-5, f(-5)) and (-2, f(-2)) is -4. D. 2; the slope of the line passing through (-5, f(-5)) and (-2, f(-2)) is 2.

Solve the problem.Suppose that a metal block is cooling so that its temperature T(in °C) is given by  where t is in hours. How long has the cooling been taking place if the block now has a temperature of 700°C?

A. 4 hr B. 1 hr C. 0.5 hr D. 2 hr

Simplify. Include the absolute value symbol if necessary. If the answer is not a real number, state so.

A. |x| + 5 B. |x - 5| C. |x + 5| D. x + 5