Respuesta :
the total check is $30.
Alejandra's tip is 20% of 12 which is $2.40
Mia's tip is 15% of 18 which is $1.80
1.8 + 2.4 = $4.20
4.20/30 = 0.14
0.14 x 100 = 14%
r = 14
Alejandra's tip is 20% of 12 which is $2.40
Mia's tip is 15% of 18 which is $1.80
1.8 + 2.4 = $4.20
4.20/30 = 0.14
0.14 x 100 = 14%
r = 14