If 18 more than 2 times a number is -10, what is the number?

Plz which expression is equivalent to the expression below?

Fiona and her friends are playing a game by guessing where a coin will land when it is randomly dropped inside the square shown below. fiona guesses that the coin is likely to land in the blue area. which explains whether or not fiona is correct and why?

Planning for the possibility that your home might get struck by lighting and catch on fire is part of a plan for ?