Can someone check my answer if I am incorrect please answer this question please answer this question correctly and please show work

Can someone me with my hwplz(only the circled ones)

Which property is illustrated by the following statement? if hxa rgi, then rgi hxa.

Draw a tape diagram to represent each situation.for some of the situations,you need to decide what to represent with a variable andre bakes 9 pans of brownies.he donates 7 pans to the school bake sale and keeps the rest to divide equally among his class of 30 students