Find the weighted mean of the numbers in the table. Round to the nearest tenth.At a supermarket during the 6 p.m. rush, the manager counted the number of customers waiting in each of the 12 checkout lines. The results are shown in the table.
A. 5.2 customers
B. 4.3 customers
C. 4.5 customers
D. 5.8 customers
Answer: B
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The position vector of a particle is r(t). Find the requested vector.The velocity at t = 0 for r(t) = ln(t3 - 5t2 + 5)i - 
j - 3cos(t)k
A. v(0) = 
i - 
j + 3k
B. v(0) = 
i - 
j
C. v(0) = - 
j
D. v(0) = 
j
Use the substitution method to solve the system. x + y = 33x + 3y = 9
A. Infinitely many solutions B. (2, 1) C. (0, 0) D. No solution
Solve.A young married couple had a combined annual income of $49,000. If the wife made $3000 more than the husband, graph the system to find the two incomes.
A. Wife's income: $43,000 Husband's income: $6000 B. Wife's income: $6000 Husband's income: $43,000 C. Wife's income: $26,000 Husband's income: $23,000 D. Wife's income: $23,000 Husband's income: $26,000
Complete.975 cm = 
m
A. 9.75 B. 9,750 C. 97,500 D. 97.5