Evaluate the expression.
x, if x = 9
A. 4
B. 
C. 7
D. 12
Answer: D
Mathematics
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Solve the differential equation subject to the given condition. Note that y(a) denotes the value of y at t = a. 
= 0.18y, y(11) = 3550
A. y = 3550 e0.18(t- 11) B. y = 0.18 e3550(t- 11) C. y = 35500.18(t- 11) D. y = 3550 e0.18(t+ 11)
Mathematics
Solve using the addition or division principle.-162 = 9z
A. -171 B. 1 C. -18 D. 171
Mathematics
Evaluate.Find the number of permutations of 7 objects taken 5 at a time.
A. 84 B. 21 C. 42 D. 2520
Mathematics
Write the expression with positive exponents. Then simplify if possible.2-3
A. 
B. 
C. 8
D. -8
Mathematics