Solve the system of equations by using an inverse matrix. x - 2y + 3z = 114x + y - z = 42x - y + 3z = 10
A. ?
B. (-2, -3, 3)
C. (2, -3, 1)
D. (2, 3, 5)
Answer: C
Mathematics
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Let x represent the unknown, and write an equation for the sentence. Do not solve. If the quotient of a number and 8 is added to twice the number, the result is 5 more than the number.
A. 
+ 2x = 5x
B. 
+ 2 = x + 5
C. 8x + 2x = 5x
D. 
+ 2x = x + 5
Mathematics
Solve the problem.Which of the lines in the picture are lines of symmetry of the given figure?
A. l and n B. m and o C. Only l D. l, m, n, and o
Mathematics
Evaluate the integral.
A. e1/2 - 1
B. 5e?/6
C. 
?
D. 5e?/6 - 5
Mathematics
Solve the equation.0.7(x + 60) + 0.5(x - 90) = 81
A. {140} B. {80} C. {60} D. {70}
Mathematics