Perform indicated multiplication on left side..
4-x+2=2x-12+3x combine like terms on both sides
-x+6=5x-12 subtract 5x from both sides
-6x+6=-12 subtract 6 from both sides
-6x=-18 divide both sides by -6
x=3
Answer:
The minimum sample size is
Step-by-step explanation:
From the question we are told that
The margin of error is
Given that the confidence level is 99% then the level of significance is evaluated as
Next we obtain the critical value of from the normal distribution table
The value is
Now let assume that the sample proportion is
hence
=>
Generally the sample size is mathematically represented as
A cheap way to go about it is, use the LCD and multiply both sides by it.
now, notice the denominators, x, 4, 4x, clearly the LCD is 4x, so let's multiply both sides by that, to do away with the denominators,
<span>-0.15384615384 repeative
or -0.153846 with a line on top</span>
If the car is traveling at 50meters per second then you need to multiply 50 by 60 to get how many meters a minute then multiply that number by 60 to get meters per hour then take that number and divide it by 1000 to get kilometers per hour.
Answer:360 kilometers in 2 hours and the car is going 180 kilometers per hour