Answer:
21
Step-by-step explanation:
You were close to de answer but you rounded in a wrong way
If we calculate <em>
</em>we get<em> 21.2602916255</em>
We need to round to the nearest whole number, it means that we have we only have two options: 21 or 22
We need to remember the rounding rules:
- If the number you are rounding is followed by 5, 6, 7, 8, or 9, round the number up
- If the number you are rounding is followed by 0, 1, 2, 3, or 4, round the number down
We see that 1 is followed by 2, it means that we have to round the number down, so our answer is 21
Me too ig we both gotta look for it
By the intersecting chords theorem, you have

Start with an equation.
Nine less... so -9
3 times a number = 3x
Greater than 40 is >40
So put together is 3x-9>40
When solving I imaging the greater than sign as an equal sign. Less confusing.
3x-9=40
3x=49
x>49/3