For the opening night at the Opera House, a total of 1000 tickets were sold. Front orchestra seats cost $70 apiece, rear orchestra seats cost $50
apiece, and front balcony seats cost $30 apiece. The combined number of
tickets sold for the front orchestra and rear orchestra exceeded twice the
number of front balcony tickets sold by 400. The total receipts for the
performance were $50,000. Determine how many tickets of each type were
sold?

I NEED HELP PLEASE ! I’ve tried.

Front Orchestra

Rear orchestra

Front balcony

The weibull distribution is widely used in statistical problems relating to aging of solid insulating materials subjected to aging and stress. use this distribution as a model for time (in hours) to failure of solid insulating specimens subjected to ac voltage. the values of the parameters depend on the voltage and temperature; suppose α = 2.5 and β = 190. (a) what is the probability that a specimen's lifetime is at most 250? less than 250? more than 300? (round your answers to four decimal places.) at most 250 less than 250 more than 300 (b) what is the probability that a specimen's lifetime is between 100 and 250? (round your answer to four decimal places.) (c) what value is such that exactly 50% of all specimens have lifetimes exceeding that value? (round your answer to three decimal places.) hr