**Answer:**

(8,-1)

**Step-by-step explanation:**

(3,-4) +(5,3)

(8,-1)

I assume 60 is the circumference of the circle.

if you sketch the graph, you will see that the radius from the center to the base, half the base, and the line segment form the center to one of the bottom vertex form a 30-60-90 degree triangle, the shortest leg is the radius of the circle, r.

the longer leg is √3r, and the hypotenuse is 2r.

the base of the triangle is 2√3r.

find r: 2πr=60, r=60/2π

2√3r=2√3*60/(2π)=60√3/π=33

For one children she charges 1.50 (4.50 : 3). So for five children she will charge 7.50 (4.50 + 1.50 + 1.50)

**Answer:**

a- the expression shows how much it would cost depending on how much of each item he sold.

b- The first expression shows the quantities of each pruduct as opposed to combinging the products (little unsure as their is no chart to go along with it)

**Step-by-step explanation:**