Answer: Add to eliminate x
Step-by-step explanation:
So if you add to 2 equations you can look at it this way. remove all variables right that leaves you with 10+4=48 and -10-3=-56 right and if you add 10 and -10 you get 0 or 0x so by adding these to equations x is eliminated by adding
To solve this problem, I would set up an equation, letting x represent our unknown value. First, we must convert 12% to its decimal equivalent, by dividing 12/100. We do this because percentages represent parts of a total 100%, so we must take the percentage (part) and divide it by 100 (whole). Since 12/100 = 0.12, we can create our equation:
182 is 12% of a number
*Remember that "is" means equals in math and "of" means multiplication*
182 = 0.12 * x
OR
182 = 0.12x
To solve this equation, we must divide both sides of the equation by 0.12 to get the variable x alone on the right side of the equation.
x = 1516.66666667
Therefore, your answer is option B, 1516.7.
Hope this helps!
Answer:
a. There's a 95% chance that the true proportion is in the confidence interval.
Step-by-step explanation:
When we want to estimate a property of a population (a population's parameter), without surveying the population, we use samples.
Then, with the information of the samples we can calculate the statistics and infere properties about a population. This inferences obviously came with some uncertainty, depending on the properties of the sample and specially the sample size.
When we talk about confidence intervals, we use the statistic of the sample (in this case, the mean) to estimate a range of values it is expected to find the true mean of the population. The width of this interval depends on the sample standard deviation and the sample size.
The value of the confidence interval (95%, 99%, etc) represent the probabilty that the true mean is within this interval.
Answer:
B. ) -2
Step-by-step explanation:
-15 ( x - 2 ) = 25
-15X + 30 = 25
-15X = 25 - 30 15 × 2 = 30
-15X = -5
X = -5 / -15
X = 1 / 3
