Find the partial derivative.Let z = f(x, y) = (x + y)4. Find 
.
A. 4y(x + y)3
B. 4(x + y)3
C. 4(x + y)
D. 4x(x + y)3
Answer: B
Mathematics
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Simplify, if possible, by combining like terms.-8y - 15y
A. 120y B. -23y2 C. 23y D. -23y
Mathematics
Use the Change-of-Base Formula and a calculator to evaluate the logarithm. Round your answer to three decimal places. log487.09
A. 0.310 B. 21.773 C. 1.940 D. 3.222
Mathematics
For the functions f(x) and g(x), evaluate the indicated function.Find 
(4) when f(x) = x - 5 and g(x) = 7x + 1.
A. - 
B. - 
C. - 
D. - 
Mathematics
Solve.x2 = 81
A. 40.5 B. -9, 9 C. -10, 10 D. 9
Mathematics