The cost of a mobile phone call is 30 cents plus 20 cents per minute. find the possible cost of a call if it is shorter than 5 minutes

The cost is less than $1.30

Step-by-step explanation:

Let

y> the total cost of a mobile phone call

x> the time in minutes

we know that

if time were x=5 minutes

the cost would be

y=0.30+0.20(5)=$1.30

but

the time is less than 5 minutes

therefore

the cost would be

y< $1.30

y=x+9

?

step-by-step explanation: