There are 12 people having lunch. each person wants 1/3 of a sub sandwich. how many whole sub sandwiches are needed ? use models to show answer.

Is the square root of 4 plus the square root of 16 rational?

One number is 4 less than 3 times a second number. if 3 more than two times the first number is decreased by 2 times the second number, the result is 11. use the substitution method. what is the first number?

The letters g e o r g i a are placed in a bag . if you picked a card and knew it was a vowel , what is the probability that it is an a ?