Aprogram on television ran 30 minutes. the program ran seven minutes longer than three times the length of the commercials. use the guess and check method to find the number of minutes the commercials ran during the program. a. 12.3 b. 3.7 c. 7.7 d. 22.3

Let c represent the total time during which commercials appeared.
Then 3c+7 = program time  = 30 minutes total

Then 3c = 23 minutes, and c = 7 2/3 minutes.  This is close to 7.7.

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