Solve the system of equations by substitution.
A. x = 5, y = -2; (5, -2)
B. x = 5, y = 2; (5, 2)
C. x = -5, y = -2; (-5, -2)
D. x = -5, y = 2; (-5, 2)
Answer: A
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Sketch the graph and show all local extrema and inflection points.y = ln (2 - x2)
A. Local maximum (0, ln 2)
No inflection point
B. Local minimum (0, ln 2)
No inflection point
C. No extrema
No inflection point
D. Local minimum (0, -ln 2)
No inflection point
Provide an appropriate response.
Using only this graph of f(x) = a(x - h)2 + k, what are the signs of h and k?
A. Both are negative. B. h is positive and k is negative. C. h is negative and k is positive. D. Both are positive.
Solve. Write the answer as a mixed number in simplest form.Maria exercises for 1
hours every Saturday. She runs for 
of the time that she exercises. How much time does she spend running every Saturday?
A. 
hr
B. 
hr
C. 1
hr
D. 1
hr
Simplify. Write your answer in the form a + bi, where a and b are real numbers.Let z = -5 + 5i and w = 5 + 2i. Find 2z + w.
A. -5 + 7i B. -5 + 12i C. -10 + 12i D. -15 + 20i