PLEASE HELP Laura has a prepaid phone plan (Plan A) that charges 18 cents for each text sent and 10 cents per minute for calls . 1. If Laura uses only text , write an equation for the cost C of sending t texts.
a. Equation c=18t

b. How much will it cost Laura to send 15 texts

c. If Laura has $8 , how many texts can she send ?

2. If Laura only uses the talking features of her plan, wrote an equation for the cost C of talking m minutes.

a. equation

b. How much will it cost Laura to talk for 22 minutes ?

c. If Laura has $9 , how many minutes can she talk ?

3. If Laura uses both talk and text ,write an equation for the cost C sending t texts and talking m minutes

a. equation

b. How much will it cost Laura to send 4 texts and talk for 13 minutes

c. If Laura wants to send 18 texts and only has $8 , how many minutes can she talk? Will this use all her money? If not, how much money will she have left ?