Fred earns $6.50 an hour, plus tips, as a waiter. suppose he works 26 hours in a week. how much money must he receive in tips to earn at least $229 that week?

To solve this problem, we set up an equation for the problem statement. We let x as the number of hours Fred works and y as the tips he earned. The equation would be:

6.50x + y = 229

Since we are given the number of hours he worked which is 26 hours. Therefore, we can solve for the tip he should earn.

6.50(26) + y = 229
y = 60

Fred's total earning is the sum of its wage and the tips. Let x be the amount he must receive in tips. This value should be equal or greater than 229. The inequality that represents this is, 
                                           ($6.5)(26) + x ≥ 229
The value of x is 60. Therefore he must receive at least $60 as tips. 

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