Solve the problem.A vendor has learned that, by pricing pretzels at $1.50, sales will reach 79 pretzels per day. Raising the price to $2.50 will cause the sales to fall to 27 pretzels per day. Let y be the number of pretzels the vendor sells at x dollars each. Write a linear equation that models the number of pretzels sold per day when the price is x dollars each.
A. y = -52x - 157
B. y = - 
x + 
C. y = -52x + 157
D. y = 52x + 1
Answer: C
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Express as a sum of logarithms.log6 
Z
A. log6 
+ log6 Z
B. log6 3Z + log6 4
C. log3 Z + log4Z
D. log6 
Find the direction the parabola opens, the coordinates of the vertex, the equation of the axis of symmetry and draw the graph.y = (x + 2)2 + 3
A. 
opens up; vertex (3, -2);
axis of symmetry x = 3
B. 
opens up; vertex (-2, 3);
axis of symmetry x = -2
C. 
opens up; vertex (-3, 2);
axis of symmetry x = -3
D. 
opens up; vertex (2, 3);
axis of symmetry x = 2
Find the probability.Assuming that boy and girl babies are equally likely, find the probability that a family with four children has all boys given that the first two are boys.
A. 
B. 
C. 1
D. 
Solve and check. Begin by using the addition or multiplication principles of equality to isolate the squared term. -3x2 = -33
A. ±
B. 16.5
C. 12
D. ±11