Answer: 72
Plan A = 30 +0.15x
Plan B = 16 +0.20x
30+0.15x = 16+0.20x
subtract 16 from each side
14 +0.15x = 0.20x
subtract 0.15x from each side
14=0.05x
x = 14/0.05 = 280 minutes
280*0.15 = 42 +30 = $72
280 * 0.20 = 56 +16 = 72
280 minutes and cost $72 each
Step-by-step explanation:
Your answer would be -15.41. If you ever need any other kind of help, just ask me.
Answer:

Step-by-step explanation:
we have

we know that
f(3) is the value of the function for the value of x equal to 3
so
substitute the value of x=3 in the function
