Mental Math A typical tip in a restaurant is 15% of the total bill. If the bill is $80, what would the typical tip be?
The typical tip would be $

A typical tip in a restaurant is 15% of the total bill. The total bill is $80, so the typical bill is 15% of 80.

To find, we will solve.

Step 1: Cross divide

100 ÷ 2 = 50

80 ÷ 2 = 40

Simplify

15 ÷ 5 = 3

50 ÷ 5 = 10

Cross divide

40 ÷ 10 = 4

10 ÷ 10 = 1

The typical tip would be $12.

Okay so for every triangle has three angles that always add up to 180 degrees. and to tell the difference between whether they are secure, right or obtuse is that acute: has one angle that is less than 90 degrees. right triangle means there is at least one angle that is exactly 90 degrees. and an obtuse angle has an angle that is bigger than 180 degrees. i’ll do #13 as an example: 13. 40 and 50 so if every triangle has 180 degrees 40+50= 90 degrees then180-90= 90 degrees so the third angle is 90 degrees and because this triangle has a 90 degree angle it means it is a right triangle

The correct answer is 10%