Answer:
I think ( b) is non proportional linear
(-7)*(2/5 + (-3/7))
= -14/5 + 3
=1/5
The answer it -2
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Answer:
? = 1 (assuming right-angled triangle)
Step-by-step explanation:
This is an application of Pythagoras' Theorem, but rearranged:

is, of course, 10, so 10 - 9 = 1, and
.
She would need to buy 10 additional bags.