What is the length of EF . Show work (please don’t use me for points)

Write two subtraction equations that are equivalent to 5 + 12 = 17.

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

Explain why the factor 1.5 is broke. into two numbers in the model.