Find the coordinates of the reflection: B (4,5) is reflected over the line y=x

Asalesperson earns $320 per week plus 8% of her weekly sales. the expression representing her earnings is 320 + 0.08x. which of the following describes the sales necessary for the salesperson to earn at least $1000 in the one week?

Find the maximum value of p= 4x + 5y subject to the following constraints :

6cm10 cma conical paper cup has dimensions as shown in the diagram. how much water can the cup hold when full?