I don’t understand the question so I answer in two ways
Her change will be $16.22 since 20 +20 is 40 and 40 - 23.78 is 16.22
Time and change, as well as nonlinear relations.
I hope this helps you
6. (-7).a^2+4.b^1+7
-42.a^6.b^8
Answer:
it is Circumference this is my answer