HELP LOOK AT THE PHOTO PLEASEEE

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.

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

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