Tammy has a ten dollar bill. She purchases an unknown number of magazines for $3.00 each and gets $4.00 change back. Which equation represents this? a) 10 – 3x = 4
b) 6 – 3x = 10
c) 2 + 3x = 10
d) 4 – 3x = 10

its A

Step-by-step explanation:

for ex: the reciprocal of 3/4 is 4/3. it is the opposite.

reciprocal definition:

a mathematical expression or function so related to another that their product is one; the quantity obtained by dividing the number one by a given quantity.

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step-by-step explanation: