Under her cell phone plan, Lily pays a flat cost of $55.50 per month and $4 per gigabyte. She wants to keep her bill at $63.10 per month. Write and solve an equation which can be used to determine xx, the number of gigabytes of data Lily can use while staying within her budget.

What is the slope of the line shown below?

Adifferent website gives the cost for the first train as £56.88 and the second train as £20.11 with a £9.50 charge for cycle storage for the whole trip. how much would the journey cost you?

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?