Solve for the requested variable without determining the constant of variation, k. Use the fact that if 
and 
then 
so that 
Assuming that y varies directly as the cube of x, and y = 10 when x = 16, find y when x = 40.
A. y = 
B. y = 
C. y = 4
D. y = 25
Answer: A
Mathematics
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Evaluate the expression.8P4
A. 1680 B. 2 C. 4 D. 70
Mathematics
If possible, evaluate the expression by hand. If not, approximate the answer to the nearest hundredth. Variables represent any real number.
A. 1.73 B. 1.44 C. 2.44 D. -9
Mathematics
Find the expected value.A car agency has found daily demand to be as shown in the table.
Find the expected number of customers.
A. 9 B. 12 C. 10 D. 2
Mathematics
Solve the system of equations by elimination.6x + 5y = 886x + 2y = 100
A. (18, -4) B. (-4, 18) C. ( -18, 6) D. (-18, 5)
Mathematics