Place values:
As each is in a different place value, when we add them neither will affect the other, meaning:

Answer: B 4.39
Answer:
subtract 1 then divide 2
Step-by-step explanation:
The answer would be C. The line is best fit so the Y-intercept wouldn't show EXACTLY how much it would cost, just around how much it would cost. (Approximately)
Answer:
Step-by-step explanation:
(3x^2-4x+10)(x^3+5x-20) =
x=1 is not a good value since when you plug it in you get -126 and you can't have a negative number of seeds.
Divide both sides by 3.1 and find g = 20.9/3.1 ≈ 6.7 ≈ 7.
You can estimate this without a calculator by saying 20.9 ≈ 21 and 3.1≈3, then 21/3=7.
In general, be careful with rounding before a calculation, because the rounding errors can be enlarged, messing up the accuracy of your answer. It's best to round only at the end.