Center piece was $40
Glasses were $2
I used the elimination method. I multiplied everything in the equation that represents the second order by five and subtracted it from the first orders equation. I then solved for y and got that each glass was $2. I then plugged the 2 back into the original equation to find that a centerpiece was $40.
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C is correct because absolute value cant be negative.
Since Carl owes his mom, it's a negative number -$27
A suitable calculator can row-reduce the augmented matrix.
first number: 3
second number: 1
third number: 8