A rectangular target has a rectangular opening that is shaded in the diagram. What is the probability that a ball thrown at the target will go through the square opening? Select all that apply

Which addition property is being illustrated below? (type commutative or associative) (6 + 7) + 1 = 6 + (7 + 1)

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

Adrawer contains 12 identical white socks, 18 identical black socks and 14 identical brown socks. what is the least number of socks you must choose, without looking, to be certain that you have chosen two socks of the same colour?