The letters r and ? represent polar coordinates. Write the equation using rectangular coordinates (x, y).r = 
A. y2 = 10x - 25
B. x2 = 10y - 25
C. y2 = 25 - 10x
D. x2 = 25 - 10y
Answer: C
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Solve the problem. The balance in your checking account is $829. You write checks for $42, $56, and $134. You then deposit $123 from your paycheck. What is your new balance?
A. $720 B. $710 C. $474 D. $1184
Perform the indicated row operations on the following matrix. 
(-2)R1 + R2 ? R2
A. 
B. 
C. 
D. 
Solve.The ratio of the length to the width of a rectangular plot is 7 to 5. Its diagonal measures 
Find the dimensions of the plot.
A. Length: 24.5 ft; width: 17.5 ft B. Length: 31.5 ft; width: 22.5 ft C. Length: 28 ft; width: 20 ft D. Length: 35 ft; width: 25 ft
Write the equation that results in the desired transformation.The graph of y = x3, vertically compressed by a factor of 0.8
A. y = 0.8
B. y = (x - 0.8)3
C. y = 0.8x3
D. y = (x + 0.8)3