You are working at the register at a grocery store during the busiest time of the day. a customer buys a mud of cheese for 4.62 and a box of crackers for 1.29. she hands you $6.00, and the register says she still owes $0.54. since you were in a hurry, you made a mistake by typing the numbers in the wrong order. what mistake did you make?

The mistake is that instead of typing 1.29 you typed 1.92
4.62+1.92=6.54
she gave you 6 and looks like she still own 0.54 cents 

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