$30 before tax
discount 20% tax 6.4%
tip 15%

$30.44

Step-by-step explanation:

$30 20% of tht is 6

30-6=24

tax is 6.4% which is 1.94

24+1.94 which equals $25.94

tips is 15% 4.5 so we add that to $25.94

 so total is $30.44

$29.14

Step-by-step explanation:

$30 before tax and discount

20% discount

100% - 20% = 80% = 0.8

0.8 * $30 = $24 after discount before tax and tip

tax: 6.4%

100% + 6.4% = 106.4% = 1.064

1.064 * $24 = $25.54

tip: 15% = 0.15

0.15 * $24 = $3.60

total = $25.54 + $3.60 = $29.14

c. (0.6,-1.4)

step-by-step explanation:

hope this