Graph the system of equations to find the solutions of x3 + 6x2 - 40x = 192. y = x3 + 6x2 - 40x

y = 192

Select all of the solution(s) to the equation.

x = –8

x = –4

x = 0

x = 6

x = 192

the formula for the cost is

c = l + p

Total cost is £47

Step-by-step explanation:

Let c represent the cost in £ of a monthly phone contract made up of the fixed line rental l in £ and the price p in £ of the calls made.

The formula for the cost, c would be

c = l + p

if the line rental is £35 and the price of calls made is £12, then, the total cost, c would be

c = 35 + 12 = £47