Kate has 21 coins (nickels and dimes) in her purse. how many nickels and dimes does she have if she has $1.50? a. 3 nickels and 18 dimes b. 5 nickels and 16 dimes c. 12 nickels and 9 dimes d. 15 nickels and 6 dimes

C. 12 nickels and 9 dimes.

This is the only one that adds up to 1.50

step-by-step explanation:

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have