Answer:
The estimated sum is ≈10
Step-by-step explanation:
This depends on how your professor wants you to estimate sums. Logically, though, a value of nearly 4 and a value of just over 6 add to about 10. The exact answer would be a bit over 10, at ≈10.14117
Answer:
A. The rate is -2 each hour
B. It is decreasing, as the hours increase, the gallons decrease
40/3. You mutiply top and bottom straight across, then simplify.
Answer:
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Step-by-step explanation:
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Answer: Choice D. 
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This is because we want to avoid having negative numbers under the square root. So we make the radicand to be 0 or larger.
The +1 at the end doesn't affect the domain.