PLSSS HELP IF YOU TURLY KNOW THISS

The party planning committee has to determine the number of tables needed for an upcoming event. if a square table can fit 8 people and a round table can fit 6 people, the equation 150 = 8x + 6y represents the number of each type of table needed for 150 people.

12 out of 30 people chose their favourite colour as blue caculate the angle you would use for blue on a pie chart

Which of the following statements are true about the graph of f (x) = 1/4 coz ( x + π/3) - 1? select two of the following that apply.