Write an equation and solve: twice a number, increased by 3 is 7.

What is the nth term rule of the linear sequence below? 27 , 25 , 23 , 21 , 19 , . .

Leo is going to use a random number generator 4 0 0 400 times. each time he uses it, he will get a 1 , 2 , 3 , 4 , 1,2,3,4, or 5 5. what is the best prediction for the number of times that leo will get an odd number?

Evaluate the following expression 1/3^2