Marie was trying to show her friend why -3 × -8 equals a positive product. This is what she wrote: -3 × 0 = 0
-3 × (?) = 0
-3(8) + -3(-8) = 0
-24 + 24 = 0

What should Marie write in place of the question mark?

What is the upper quartile in the box plot?

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a. m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20