Find an equation of variation for the given situation.y varies jointly as x and the square of z, and y = 60.9854 when x = 0.2 and z = 4.9
A. y = 13.2x
B. y = 14.9xz2
C. y = 2.54x2z2
D. y = 12.7xz2
Answer: D
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Solve the problem.A computer manufacturer has three outlet stores that sell its four computer systems. The following table shows the numbers of systems sold by the three stores in July. 
The prices of the systems are: $1200 for System 1, $1500 for System 2, $1600 for System 3, and $2100 for System 4. Write the information from the table as a 4 x 3 matrix B. Write a row matrix A for which the entries represent the prices for the systems. If C = AB, find c11 . What does this entry of C represent?
A. c11 = 153,000. c11 represents the sales of System 2 at all stores in July. B. c11 = 173,000. c11 represents the total sales at Store 3 in July. C. c11 = 163,000. c11 represents the total sales at Store 1 in July. D. c11 = 185,000. c11 represents the total sales at Store 1 in July.
Which of the following is NOT characteristic of a student who functions at the first van Hiele level?
a. Being able to name a square when it is shown to him or her b. Carefully comparing sides and angles of shapes to one another c. Believing that squares and rectangles are completely different shapes d. Thinking that changing the orientation of a square makes it a different shape
Let triangle ABC have standard labeling. Given the following angles and sides, decide if solving the triangle results in the ambiguous case.b, ?, and ?
A. No B. Yes
Solve the equation by completing the square.x2 + 4x = 9
A. {-2 ± 
}
B. {-1 ± 
}
C. {2 + 
}
D. {-2 ± 2
}