Answer:
-2 a b + 2 b + 6 a^2 + 9
Step-by-step explanation:
Simplify the following:
2 a^2 + a b + 2 b + 4 a^2 - 3 a b + 9
Grouping like terms, 2 a^2 + a b + 2 b + 4 a^2 - 3 a b + 9 = (a b - 3 a b) + 2 b + (2 a^2 + 4 a^2) + 9:
(a b - 3 a b) + 2 b + (2 a^2 + 4 a^2) + 9
a b + a b (-3) = -2 a b:
-2 a b + 2 b + (2 a^2 + 4 a^2) + 9
2 a^2 + 4 a^2 = 6 a^2:
Answer: -2 a b + 2 b + 6 a^2 + 9
The answer for the problem is 27.75
$6 . It will cost $6 because spending 6 dollars , 50 times will equal $300
Answer:
it has one root x=2/5
Step-by-step explanation:
Answer:
One can be 95% confident that the drive-through service times of fast-food chain is between 169 seconds and 172 seconds.
Step-by-step explanation:
The confidence interval gives a range of value for the population mean or parameter, which is calculated from the statistic value of the data (that is sample statistic). This range gives the interval which is associated with a certain level of confidence for which the interval will contain the true value of the unknown parameter (true value). In the scenario above, the associated confidence level is 95%.Hence, we can be 95% confident that the true value will be continued with the interval (169 ; 172)
