The histogram shows the ages of cars sold at a car auction.
what percent of the cars was less than 20 years old or more than 40 years old?

Adding up all of the values in the histogram, there were 20 cars sold in total. Of those, 5 were under 20 years old and 3 were more over 40. That means that 8/20 of the cars fit the bill. Multiplying the numerator and denominator by 5, we find that 8/20 = 40/100, or 40%.

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