Perform each calculation. See Example 3. ...

Question

Perform each calculation. See Example 3.                                                                                                                                                                                                                                                                                                         
                                                                                                                                                                                                                                                                                                                                                                                  
   90° ― 17° 13'

Accepted Answer

Hello, everyone. We are asked to subtract the angles. 88 degrees minus 12 degrees, 27 minutes. Our answer choices are a 75 degrees minutes. B 74 degrees 27 minutes. C 75 degrees. 33 minutes. D 74 degrees. 33 minutes. First, I'm going to rewrite this vertically. So that way I have the degrees under the degrees and the minutes under the minutes. So we have 88 degrees minus 12 degrees, 27 minutes. So notice 88 degrees has no minutes. I'm gonna put it in as zero minutes as a placeholder. Thinking back to when I first started doing subtraction. If I were doing 100 minus 15, I would need to borrow, I'm gonna do the same thing here. The difference is in order to borrow here, I need to recall that one degree is equal to 60 minutes. So I'm gonna borrow from the 88. So 88 degrees will become 87 degrees and zero minutes will become 6, 60 minutes. So we'll have 87 degrees, 60 minutes minus 12 degrees 27 minutes. Now, I have the ability to do the subtraction. So, subtracting my minutes, I end up with 33 minutes and then subtracting the degrees I get 75 degrees, 33 minutes. And that's gonna be my answer and it's answer choice. C have a nice day.

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Perform each calculation. See Example 3. 90° ― 17° 13'