3 years ago

Using mental math, the approximate tip to leave for a bill of $81.79, if you tip 15% would be _____..

Mathematics

2 answers:

Ad libitum [116K]3 years ago

7 0

About $12.30

($12.27)

netineya [11]3 years ago

3 0

81.79 is approximately 80.
10% of 80 is 8
20% of 80 is 16
15% is right in between 10% and 20%, so the tip should be $12 which right in between $8 and $16.

You might be interested in

Write an explanation for both Part A and Part B using 3-4 complete sentences. Part A: Explain how you can determine if a system

vampirchik [111]

Answer:

Step-by-step explanation:

Part A : when comparing graphs : A system of equations will have no solutions (on a graph) when your lines never cross each other. They never cross each other because your lines are parallel.

Part B : by comparing each algebraic equation : A system of equations will have no solution if your lines are parallel. Parallel lines will have the same slope but different y intercepts. Example :

2x - y = 2

4x - 2y = 8

put both equations in slope intercept form

y = 2x - 2

y = 2x - 4

they both have the same slope of 2.....and the y intercepts are different....meaning they are parallel lines and have no solutions

7 0

3 years ago

Simplify -3y(y + 2)^2 - 5 + 6y

ser-zykov [4K]

Answer:

That'll help a lot of people in the future ^.^