None of the above because (t+r) is just getting rid of the numbers which you can't do and I don't know where 4 even came from in b!
Answer:
70.5
Step-by-step explanation:
Refer to attached image
I think its 18.5
I hope this helped
Answer:
Same as completing the square for algebra.
Step-by-step explanation:
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The answer is -1/9. If you have any questions let me know