At Best Buy they have a stereo system that sells for $2200 and is on sale for 15% and sales tax is 7%. What is the final cost? (
1 answer:
You might be interested in
Answer:
(a) The value of <em>a</em> is 53.35.
(b) The value of <em>a</em> is 38.17.
(c) The value of <em>a</em> is 26.95.
(d) The value of <em>a</em> is 25.63.
(e) The value of <em>a</em> is 12.06.
Step-by-step explanation:
The probability density function of <em>X</em> is:
Here, 22 < X < 55.
(a)
Compute the value of <em>a</em> as follows:
Thus, the value of <em>a</em> is 53.35.
(b)
Compute the value of <em>a</em> as follows:
Thus, the value of <em>a</em> is 38.17.
(c)
Compute the value of <em>a</em> as follows:
Thus, the value of <em>a</em> is 26.95.
(d)
Compute the value of <em>a</em> as follows:
Thus, the value of <em>a</em> is 25.63.
(e)
Compute the value of <em>a</em> as follows:
Thus, the value of <em>a</em> is 12.06.
<h3>Answer:</h3>
See the attached
<h3>Step-by-step explanation:</h3>When you square the binomial (a -b), you get ...
... (a -b)² = a² -2ab +b²
That is, both the a² and b² terms have positive signs, and the middle term is twice the product of the roots of the squared terms.
The last two selections have negative signs on the constant, so cannot be perfect square trinomials.
The first selection has a middle term that is -ab, not -2ab, so it is not a perfect square trinomial, either.
The second selection is the correct one:
... 4a² -20a +25 = (2a +5)²