Translate each situation into an equation:
1) janine, who bought $15 worth of make up, spent $6 less than leah spent.
2)rob, who has all 13 girls' phone numbers that are in his homeroom, has 3 more than half the number of girls' phone number that jay has.

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

tip $2.90

total $17.40