Please help asap need this rn what is the value of a + b - c if a=20, b=10 and c= 5 and 1/2
please show how you found it (show your work)

Find the average speed of a rabbit that runs a distance of 22 m in a time of 1.8 s .

Oscar and julie ashton are celebrating their 15th anniversary by having a reception hall. they have budgeted $4,500 for their reception. if the reception hall charges a $90 cleanup fee plus & 36 per person, find the greatest number of people that they may invite and still stay within their budget.

Find the area of the triangle formed by the origin and the points of intersection of parabolas y=−3x^2+20 and y=x^2−16.