Determine if f(x, y)=10−x^2−y^2 is increasing or decreasing at (7,−3) if we take y to be constant and let x vary. Also determine if f(x, y) is increasing at (7,−3) if we take x to be constant and let y vary.

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.

Given a: b and b: c, find a: b: c. write the ratio in simplest form. a: b=6: 10 and b: c=21: 33

Select all of the following expressions that are equal to 2.5.