21, 28, and 35 are multiples of 7. So you can divide each number by 7 (in other words scaling the triangle down by a scale factor of 7).
It becomes 3,4,5, which is the base Pythagorean triple.
3^2 + 4^2 = 5^2
9 + 16 = 25
The main floor has 26 rows of 29 seats each, that is 26*29 = 754 seats
And in the balcony there is 8 rolls of 23 seats, that is 8*23 = 184 seats
So the difference is 754 - 184 = 570
Then the main floor has 570 seat more than the balcony
Answer: 11
Step-by-step explanation:The given expression is:
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=
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Substituting the value of b=-2 in above expression, we get
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=
=
Thus, the value of the given expression is -11.
