Solve the problem.A vendor has learned that, by pricing pretzels at $1.00, sales will reach 159 pretzels per day. Raising the price to $2.00 will cause the sales to fall to 119 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 = -40x + 199
B. y = - 
x + 
C. y = -40x - 199
D. y = 40x + 119
Answer: A
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Factor completely.x2 + 16x + 64
A. (x - 8)2 B. Cannot be factored C. (x + 8)(x - 8) D. (x + 8)2
Find the domain of the given function.f(x) = 
A. [
, ?)
B. (-?, ?)
C. (-?, 
]
D. [- 
, ?)
Solve the problem.Four times a number added to 9 times the number equals 
Find the number.
A. 7.2 B. 5 C. 7 D. 0.6
Mark as true any statement that is always true. Mark as false any statement that is never true or that is not necessarily true. Be able to justify your answers.
1. An obtuse triangle has at least two obtuse angles. 2. All regular quadrilaterals have four lines of symmetry. 3. All regular polygons tessellate the plane. 4. The parallel sides in a trapezoid are called the legs of the trapezoid. 5. Regular polygons are polygons with all sides congruent and all angles congruent.