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9

Step-by-step explanation:

45 devided by 5 = 9

Step-by-step explanation:

As Area of Rectangle - length * width

As given Area =45  , width = 5  length =x

Hence putting in formula we get ,

45 =5*x

x=9

b

step-by-step explanation:

calculate the scale factor as the ratio of corresponding sides, image to original, that is

scale factor = = = = 1

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.