Evaluate this expression:
0.4(5/2)- 31.2/3
need help!!

For how answer my question this will be the last question can you answer in math subject

The given dot plot represents the average daily temperatures, in degrees fahrenheit, recorded in a town during the first 15 days of september. if the dot plot is converted to a box plot, the first quartile would be drawn at __ , and the third quartile would be drawn at link to the chart is here

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)