Write the system in the form 
Then solve the linear system by computing 
with a calculator. Round numbers to the nearest tenth, as necessary.2.5x + 1.1y - 3.5z = 4.05.2x - 5.4y + 0.6z = -2.33.5x + 4.3y + 3.5z = 11.4
A. (2.3, 3.1, 0.4)
B. (1.2, 1.6, 0.2)
C. (4.6, 6.3, 0.7)
D. (0.6, 0.8, 0.1)
Answer: B
Mathematics
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The graph of y = f(x) is given. Use the graph to find the function value.
Find f(-4).
A. -4 B. 1 C. None of these D. 1.8
Mathematics
Solve the problem.Walt made an extra $5000 by working a second job. He invested part of this money at 7% and the rest at 10%. If his annual return totaled $470, how much must he have invested at 10%?
A. $3000 B. $2500 C. $4000 D. $1000
Mathematics
Solve the equation.
x - 1 = 
x - 5
A. 10
B. 15
C. 30
D. - 
Mathematics
Simplify.
- 
A. 
x2y + 
B. 
x2y + 
C. - 
x2y + 
D. - 
x2y + 
Mathematics