3. An empty bag has a weight of 400g. When 6 footballs are packed into it the total weight is 3070g. What is the weight of one football?

Step-by-step explanation:

Weight of empty bag = 400g

Total Weight of bag = 3070g

Weight of 6 footballs packed = 3070g -400 = 2670

Weight of 1 football = 2670 ÷ 6 = 445g

step-by-step explanation:

we have

using a graphing tool

see the attached figure

this is a quadratic equation (vertical parabola) open up

the vertex is a > vertex

the domain of the function is all real > interval (-∞,∞)

the range of the function is the > [-6.125,∞)

the function has two x->   and

the function is increasing over the > (0.25,∞)

the function is decreasing over the > (-∞,0.25)

this is a good question! i'll do some research and come back when i have the answer!