Using this input and output machine, f(x) equal? input. output

2 9
3. 15
5. 33
7. 59

At dinner, 2/5 of the people had fish and 1/3 had chicken. if everyone else had lamb, what fraction of the people had lamb? and if 40 people had lamb , calculate the total number of people at the dinner.

An objects motion is described by the equation d= 4sin (pi t) what will the height of the object be at 1.75 seconds?

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.