Which situation(s) describe(s) a parameter? There may be more than one correct answer. Select all that apply.

Apparel accounted for 40% of the merchandise purchased at a playoff game between the Lions and Sharks.

At one of 20 concession locations, 40% of the purchases come from hot dogs, 2% from hamburgers, 40% from drinks, and 18% from snacks. Based on this information, the concession manager decides to stop selling hamburgers at all locations.

A crowd of 20,000 fans attends a playoff game between the Lions and Sharks.

A poll of 500 fans reveals that 60% of the crowd wants the Sharks to win.

A crowd of 20,000 fans attends a playoff game between the Lions and Sharks, and 5% of the tickets were purchased at the ticket booth that day.

Of the 20,000 fans attending a playoff game between the Lions and Sharks, 700 are season ticket holders.

  about 5.6 days

step-by-step explanation:

we can fill the given information into the decay equation and solve for the value of t at which half the sample remains.

the half-life is about 5.6 days.

5

step-by-step explanation:

(0,-3) see attached graph

step-by-step explanation:

a. to solve the system, graph the two equations.

x = y+3 becomes y=x-3 has m=1/1 and b=-3. start at (0,-3) on the y-axis and plot a point. then move up 1 unit and 1 unit to the right. plot a point and connect.

y=-4x+3 has m =-4/1 and b=-3. start at (0,-3) on the y-axis and plot a point. then move down four units and to the right 1 unit. plot a point and connect.

the solution is the point (x,y) where the two lines intersect. by the graph below it is (0,-3).

b. to solve by substitution, substitute y = -4x-3 into x= y+3

x= (-4x-3) +3

x=-4x

5x=0

x=0

now substitute x = 0 back in to find y.

y= -4(0)-3

y=0-3

y=-3

solution is (0,-3)

c. use elimination by adding the equations together.

x-y=3

4x+y=-3

5x=0

x=0

then substitute into one equation to find y.

y=-4(0)-3

y=-3

a

step-by-step explanation: