1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Elodia [21]
3 years ago
15

(2) Twelve theater fickets Price: $6.79 each Tax Rate: 5%

Mathematics
1 answer:
lakkis [162]3 years ago
4 0

Answer:

85.55

Step-by-step explanation:

i dont know if im right but

1) i took 12 × $6.79 for the total cost ehich totalled out to 81.48

2) i used calcutator.net and put in the sales tax 5% ($4.07)

3) it gave me $85.55 after adding the tax

You might be interested in
Which is the graph of x-4y=4
alex41 [277]
Your slope intercept form of this equation is : y= 1/4x-1. Which is the second graph
6 0
3 years ago
Read 2 more answers
B=3,c=7 Please help Iam struggling
Afina-wow [57]
Please provide more information
8 0
3 years ago
Find all the zeros of the equation x^4-6x^2-7x-6=0 Explain please.
Alina [70]
<h3>Answer:</h3>
  • zeros are {-2, 3, (-1±i√3)/2}
<h3>Step-by-step explanation:</h3>

I like to look at a graph of the function to see where the zeros might be. Here, there are x-intercepts at x=-2 and x=3. These can be factored out using synthetic division to find the factorization to be ...

... (x +2)(x -3)(x² +x +1) = 0

By completing the square, using the quadratic formula, or by looking at the graph of it, the complex roots of the quadratic factor can be found to be ...

... x = (-1 ±i√3)/2

_____

The second attachment shows my synthetic division. The first division takes out the root x=3 to give a quotient of x³ +3x² +3x +2. The second division takes out the root -2 to give the quotient of x² +x +1. (You can see that I tried -1 as a root first.)

The graph shows both the quartic and the quadratic factor of it. The latter has a leading coefficient of 1 and a vertex at (-1/2, 3/4), so you know the complex roots are -1/2 ±i√(3/4).

_____

<em>From the beginning</em>

There is only a very complicated formula for the roots of a quartic equation, so these are usually solved by machine or by some form of trial and error (iteration). There are some helps, like Descarte's Rule of Signs, and the Rational Root theorem.

Here, the former looks at the one sign change in the coefficients to tell you there will be 1 positive real root. Changing the sign of the odd-degree terms makes there be 3 sign changes, so there will be 3 or 1 negative real roots. Thus, we're assured at least two real roots, one of each sign.

We can look at the constant term to find the y-intercept to be -6. We can add the coefficients to find the value of the function is -18 for x=1, so the positive real root is larger than 1.

The Rational Root theorem says any rational roots will be factors of 6, the constant term. Choices are 1, 2, 3, 6. We have already eliminated 1 as a possibility, and we consider it unlikely that 6 will be a root. (The 4th power overwhelms the other terms in the function.) We tried 2 and found it doesn't work (this was before we graphed the function). The attached division result shows that 3 is a root, as does the graph.

Once you get down to a quadratic, you can find the remaining roots in the usual way. Because it is so simple to read them from the graph, we decided to graph the quadratic factor.

_____

<em>Comment on terminology</em>

"root" and "zero" are essentially the same thing when the function is equated to zero, as here. The terms refer to the value(s) of x that make the polynomial function evaluate to zero.

8 0
3 years ago
in the diagram below ,segment A'B' is the image of segment AB after a rotation by 103 degrees counterclockkwise about point C. W
Helen [10]

Answer:

2

Step-by-step explanation:

6 0
3 years ago
What is the slope of the line that passes through the point 3,5 and -2,2
Nostrana [21]

Answer:

3/5

Step-by-step explanation:

Slope=

\frac{y2 - y1}{x2 - x1}

slope =

\frac{2 - 5}{ - 2 - 3}

=

\frac{3}{5}

8 0
3 years ago
Other questions:
  • Orders of operations. 2{6+2(6*7-18)}=
    8·1 answer
  • Please help me out!<br> (show all work)
    6·1 answer
  • A music store marks up the instruments it sells by 30%. If the store bought a guitar for $45, what will be its store price? Roun
    11·1 answer
  • Given that ZEQ, solve the inequality - 4(z - 3) - (- 4z - 4) &lt; -3(3z - 1)
    12·1 answer
  • According to these three facts, which statements are true? Circle D has center (2, 3) and radius 7. Circle F is a translation of
    15·1 answer
  • Using the linear equation 4x–3y=12, express:
    6·1 answer
  • 10%of what is 14 i need to find the whole number
    12·1 answer
  • Suppose f(x) is a function such that if p f(x) can be odd or even.<br> f(x) can be odd but cannot be even.<br> f(x) can be even
    6·1 answer
  • Write the equation of a parabola whose directrix is X=11.25 and focus is (6.75,6) Please Help me
    13·1 answer
  • Help statistics<br>no spam​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!