Decide whether the following is an expression or an equation.15 + 2(x - 10) = 18 - x
A. Equation
B. Expression
Answer: A
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Match the equation with the surface it defines.
+ 
= 
A. Figure 4 B. Figure 2 C. Figure 1 D. Figure 3
Decide whether the statement is true or false.Two parallel lines lie in the same plane.
A. True B. False
Provide an appropriate response.What is echelon form?
A. The coefficient portion of the augmented matrix has 1's on the diagonal from upper right to lower left and 0's below the 1's. B. The coefficient portion of the augmented matrix has 1's on the diagonal from upper left to lower right and 0's above the 1's. C. The coefficient portion of the augmented matrix has 1's on the diagonal from lower right to upper left and 0's below the 1's. D. The coefficient portion of the augmented matrix has 1's on the diagonal from upper left to lower right and 0's below the 1's.
Perform the indicated operations and simplify the result. Leave the answer in factored form.
A. 
B. 1
C. 
D. 12