Solve the system of equations. If the system has infinitely many solutions, let the last variable be the arbitrary variable.w - x + 2y + z = 1 x + y = 1 y - z = 3
A. ?
B. {(-7 - 4z, -2 - z, 3 + z, z)}
C. {(-7, -2, 3, z)}
D. {(-11, -3, 4, 1)}
Answer: B
Mathematics
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Find the slowest growing and the fastest growing functions as 
y = exy = ex/5y = xxy = 9x
A. Slowest: y = ex/5 Fastest: y = xx B. Slowest: y = xx Fastest: y = 9x C. Slowest: y = ex/5 and y = ex grow at the same rate. Fastest: y = 9x D. Slowest: y = ex/5 and y = ex grow at the same rate. Fastest: y = xx
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Graph the equation.y = -x2 - 3x - 8
A. 
B. 
C. 
D. 
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Find the length of the curve.x = 2t, y = 
t 3/2, 0 ? t ? 21
A. 39
B. 82
C. 78
D. 
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Express as a sum, difference, and product of logarithms, without using exponents.logb 
A. 
logb x - 
logb x + 3logb z
B. 
logb x9 + logb y5 - logb z6
C. 
logb x + 
logb y - 3logb z
D. 
logb x + 5logb y - 6logbz
Mathematics