X= 7
This is because of you plug in 7 for x into the equation it will give you 28-10 which is 18.
Answer:
V = 10,240mm^3
Step-by-step explanation:
The volume of pyramid is given by the following formula:
(1)
b: base of the pyramid = (32mm)^2
h: height
Thus, it is necessary to find the value of h, by using the Pitagoras's theorem, one half of the base and the slant height (which forms a rectangle triangle with h):

by replacing in (1) you obtain:

hence, the volume is 10240mm^3
20 rows x 18 seats per row= 360 after that is 5 dollars for the cost of the tickets so multiply 360 by 5 and you will get the answer of 1800.
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