Aide oplied the distributive property to write the event expressions below 15.21 - 30
What is Ada's stor?
Aida used as the factor, which is not common to 15 und 21
Aida did not correctly divide by the common factor to get
Ada did not apply the corect operations to the expression
Aide wrote to expressions that we not quivalent

Aida did not correctly divide by the common factor to get (4 + 8).

She should have written: (5 + 7)

It would look like this: 15 + 21 = 3(5 + 7)

This make both sides equivalent: 15 + 21 = 15 + 21 Yay!

Hope this helps!

5

10

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55

a is 8.b is 10.c is 10.5. d is -.5

step-by-step explanation:

just minus the smallest number from the biggest.