Answer:
The tip should be $9.00
Step-by-step explanation:
Answer: 30.6
Step-by-step explanation: she worked 30.6 hours be cause if you think 36 of 15% it is 30.6 hours she worked
Answer: b=13, t=29
Step-by-step explanation:
Substituting the first equation into the second,

Answer:
-13
Step-by-step explanation:
45 hours.
80 - 70= 10, and 450/10 is 45.
to justify, you can do 70x45= 3,150, and 80x45= (3,600 - 3,150= 450)