Hector is competing in a 42 mile bicycle race. he has already completed 18 miles of the race and is traveling at a constant speed of 12 miles per hour when wanda starts the race. wanda is traveling at a constant speed of 16 miles per hour. write and solve an equation to find when wanda will catch up to hector

Let x = the hours needed for Wanda to catch up to Hector.

Hector has already completed 18 miles. Hector travels at 12 miles per hour.
After x more hours, Hector will travel
18 + 12x miles

Wanda travels at 16 miles per hour. In x hours, she travels
16x miles

If Wanda catches up to Hector, then
16x = 18 + 12x
4x = 18
x = 4.5 hours

  4 hours, 30 minutes (or 4.5 hours)

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