The expression that represents the cost of her bill last month would be 40 + 0.2t.
The forty represents the forty dollars charged each month for unlimited calling, and the 0.2t represents the amount of money charged for her text messages.
Answer:

Step-by-step explanation:
The cosine rule is
=> 
For 2abCosC, it becomes
=> 
=> 
=> 
Answer:
Step-by-step explanation:what is your question
All that is needed is for you to graph the points and if they form a line, they will be collinear. If not, they will not be collinear.
This is what I get
You have to place the decimal numbers over the power of 10.since its 6 places to the right will be 10^6(1000000).
464646/1000000
Now cancel common factors by factoring out 2.
232323/500000=0.464646