Let x= number rows
Then x + 5 = number of seats per row
x(x+5) = 126
X^2 + 5x = 126
x^2 + 5x -126 = 0; now factor or use quadratic:
(x+14)(x-9) = 0; so the answers are either -14, or 9, and since -14 is not possible in this case because you can't have a negative number of rows, the answer is 9 rows.
Check work: number of rows = 9, number of seats per row = 9+ 5= 14, and 9 x 14 = 126
Answer:
12/10 =1.2 - 1 = 0.2 x 100 = 20%
Step-by-step explanation:
Answer:
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Answer:
7x
Step-by-step explanation:
Answer:
A
Step-by-step explanation:
The ratio is 1:5 so you're looking for the one that is not 1:5. A is 1:3
