A group of friends go to lunch. The bill for the meal, including tax, is $45. The service was fair, so they leave a tip that is 15% of the bill. What is the total cost of the meal, with the tip ?

$51.75

Step-by-step explanation:

the tip was 6.75 dollars so 45 + 6.75 is 51.75

v: l•w•h÷2.

v: 20•6•8 ÷2

v: 960÷2

v: 480

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: