Determine the row operation that was used on the first matrix to obtain the second matrix.
, 
What will be an ideal response?
7R2 ? R2
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Find Q when XL = 47 Kê and R = 33 Kê.
a. 5.4 b. 1.3 c. 2.8 d. 0.7 e. 8.0
Solve the problem.A textbook economy has only two industries, the electric company and the gas company. Each dollar's worth of the electric company's output requires 0.20 of its own output and 0.4 of the gas company's output. Each dollar's worth of the gas company's output requires 0.50 of its own output and 0.7 of the electric company's output. What should the production of electricity and gas be (in dollars) if there is a $16 M demand for electricity and a $7 M demand for gas?
A. Electricity: $107.5 M; Gas: $100 M B. Electricity: $125 M; Gas: $92.5 M C. Electricity: $115 M; Gas: $103.5 M D. Electricity: $97.5 M; Gas: $103 M
A point on the terminal side of an angle ? is given. Find the exact value of the indicated trigonometric function of ?.(5, 12)Find sin ?.
A. - 
B. - 
C. 
D. 
Solve the problem.Suppose that the population of a town can be approximately modeled by the formula 
where t is the time in years after 1980 and P is the population of the town in thousands. Find an expression for 
in terms of t.
A. dP/dt = 
B. dP/dt = 
C. dP/dt = 
D. dP/dt = 