Answer:
a<5
Step-by-step explanation:
Let's solve your inequality step-by-step.
3a+6<21
Step 1: Subtract 6 from both sides.
3a+6−6<21−6
3a<15
Step 2: Divide both sides by 3.
3a
3
<
15
3
a<5
Answer:
a<5
Answer:
x² * -1/2,
x² + 3
Step-by-step explanation:
The first exprsession always returns a positive number for the square but ends up being negative after the multiplication no matter the inputted values. The second one is always positive.
The expression that is not rational is the first one:

<h3>
</h3><h3>
Which of the given expressions is not rational?</h3>
A rational expression is something of the form:

Such that q(x) can be any polynomial, and p(x) is a polynomial of at least degree 1.
This means that we need to have the variable "x" on the denominator.
Then is easy to recognize the expression that is not rational, is the one that does not have x on the denominator, which is the first one:

If you want to learn more about rational expressions:
brainly.com/question/1851758
#SPJ1
Answer:

Step-by-step explanation:
For this case we have a sample size of n = 250 units and in this sample they found that 24 units failed one or more of the tests.
We are interested in the proportion of units that fail to meet the company's specifications, and we can estimate this with:

The margin of error is the range of values below and above the sample statistic in a confidence interval.
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
The confidence interval for a proportion is given by this formula
For the 98% confidence interval the value of
and
, with that value we can find the quantile required for the interval in the normal standard distribution.
And the margin of error would be:

Answer:
15
Step-by-step explanation:
Simply subtract the smaller number from the bigger number, and divide by 2. Or add the two numbers together and divide by 2.