Solve.xy - x2 = -20x - 2y = 3
A. (-5, -1) and 
B. (5, 1) and 
C. (5, 1) and 
D. (-5, -1) and 
Answer: C
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Perform the matrix operation.Let C = 
and D = 
. Find C - 4D.
A. 
B. 
C. 
D. 
Solve the problem.Suppose you invest $P on a CD paying 3.375% interest compounded continuously for a term of 100 days. At the end of the term you get $10,092.89 from the bank. Find the value of the original principal P. Round your answer to the nearest dollar.
A. $9995 B. $10,025 C. $10,125 D. $9975 E. $10,000
Multiply and simplify.
? 
A. 
B. 
C. 
D. 120xy
Hooke's Law states that the force F required to compress or stretch a spring (within its elastic limits) is proportional to the distance d that the spring is compressed or stretched from its original length. That is, 
where k is a measure of the stiffness of the spring and is called the spring constant. The table shows the elongation d in centimeters of a spring when a force of F newtons is applied. Use the regression capabilities of a graphing utility to find a linear model for the data. Round the numerical values in your answer to three decimal places.
?
F 20406080100 d1.83.65.47.29 ?
A. 
B. 
C. 
D. 
E. 