Answer:
9
Step-by-step explanation:
r/3 +5 ≤ 8
Subtract 5 from each side
r/3 +5 -5≤ 8-5
r/3 ≤ 3
Multiply each side by 3
r/3 *3 ≤ 3*3
r ≤ 9
The only value that is less than or equal to 9 is 9
4 just count how many are there that are between 19-21
89+30=119 180-119=61 degrees
The third angle is 61
0.16666666666.... is 1/6 as a fraction
