Find the product.[(5x - y) + 3z][(5x - y) - 3z]
A. 25x2 + y2 - 9z2
B. 25x2 + y2 + 30xz + 6yz - 9z2
C. 25x2 - 10xy + y2 + 30xz + 6yz - 9z2
D. 25x2 - 10xy + y2 - 9z2
Answer: D
Mathematics
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Assuming that the equations define x and y implicitly as differentiable functions 
find the slope of the curve 
at the given value of t.2x - t2 - t = 0, 2ty + 6t2 = 6, t = 1
A. - 6 B. 9 C. - 9 D. - 4
Mathematics
Evaluate the integral using the given substitution.
dx , u = - 
A. - 
+ 
sin 
+ C
B. - 
+ sin3 
+ C
C. 
+ 
sin 
+ C
D. - 
+ 
sin 
+ C
Mathematics
Solve.
+ 
= -1
A. 1
B. No solution
C. 0
D. 
Mathematics
A formula is given, along with values for all but one of the variables in the formula. Find the value of the variable that is not given.P = 4s for s = 35
A. s = 140 B. P = 140 C. P = 39 D. s = 31
Mathematics