Answer: 11
Step-by-step explanation: The sum of 15 and six times t will be 15 + 6t = 81.
Now, you subtract 15 from both sides to isolate the constants from the variables on the left side and on the other side and you will end up with 6t = 66. Then, you divide 6 from both sides to finally isolate the numbers from the variable and 66 divided by 6 would equal 11
Hope this Helps :)
C. You would first have to divide A by Pi, then take the square root of r, in order to get r by itself.
Answer:
8
Step-by-step explanation:

Answer:
negative 5/4
Step-by-step explanation:
Answer:
80
Step-by-step explanation:
because 8 is in tens place
so it´s value is 8*10=80