Can you solve this question as soon as possible. , advance (its discrete math question )
1. prove the following about the empty set using both the elementwise and algebraic methods of proof:
(a) ∩ − = ∅
(b) ⊆ ℎ ∩ = ∅
(c) − ∩ ∩ = ∅

What is the smallest integer n such that n\sqrt{2} is greater than 20

Thales was an ancient philosopher familiar with similar triangles. one story about him says that he found the height of a pyramid by measuring its shadow and his own shadow at the same time. if the person is 5-ft tall, what is the height of the pyramid in the drawing?

Consider this equation. |y + 6| = 2 what can be concluded of the equation? check all that apply. there will be one solution. there will be two solutions. the solution to –(y + 6) = 2 will be also be a solution to the given absolute value equation. the solution(s) will be the number(s) on the number line 2 units away from –6. the value of y must be positive since the variable is inside absolute value signs.