The sample space, s, for flipping a a coin three times is shown below. what is the probability of obtaining heads at least once?

Liesl grew 7/12 of a foot in one year. her little sister grew 1/3 of a foot during that same year. how much more did liesl grow than her little sister did

Which of the symbols correctly relates the two numbers below check all that apply 6? 6

Square a has a side length of (2x-7) and square b has a side length of (-4x+18). how much bigger is the perimeter of square b than square a?and show all work! you so