Compare the number of friends at the beginning of a month and at the end of that month if it decreased by 60 and increased by 80

Is the following relation a function? x y 1 4 −1 −2 3 10 5 16 yes no

Simplify the expression 10/11(22z) + (a+5) -1

Which shows the correct lengths of side c in both scales? scale 1: 45 m; scale 2: 60 m scale 1: 60 m; scale 2: 45 m scale 1: 36 m; scale 2: 27 m scale 1: 27 m; scale 2: 36 m mark this and return save and exit