First, you need to change them so that they all havea the same denominator. 1/2, 3/4,5/4, 1/4. You can make them all the same by changing the 1/2 to 2/4. Now you can see that 1/4 goes first, on the first little upright on the line between 0 and 1. 1/2 goes on the next little upright. 3/4 goes on the third upright. 5/4 goes on the upright line past the 1.
To round to the nearest whole number, you would round the 1/4 down to 0. 1/2 I would round up, but it can go either way. I would call it 1. 3/4 goes up to 1. 5/4 would be rounded DOWN to 1.
Since you have a three digit number the hundreth digit is not zero. Then from the fact that h = t -8, t must be 9, then u = 9-5 or 4. Your answer is 194.
Step-by-step explanation: His hair has grown 3cm 7 times over the course of 21 days. This totals 14 in of growth since 21/3*2=14. Then 24-14 gets you 20