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
Katyanochek1 [597]
3 years ago
14

Debra bought 7 boxes of chocolates. Each box cost $9.55. How much did she spend?

Mathematics
1 answer:
Dafna11 [192]3 years ago
4 0

Answer:

$66.85

Step-by-step explanation:

One box equals $9.55.

There are seven boxes, so multiply the $9.55 by 7 to get your answer:

7 × 9.55 = 66.85.

Debra spent $66.85 for all seven boxes of chocolates.

You might be interested in
Which statements are true about the graph of the function f(x) = x2 – 8x + 5? Check all that apply.
statuscvo [17]

Answer:

A, D, E are true

Step-by-step explanation:

You have to complete the square to prove A.  Do this by first setting the function equal to 0, then moving the 5 to the other side.

x^2-8x=-5

Now we can complete the square.  Take half the linear term, square it, and add it to both sides.  Our linear term is 8 (from the -8x).  Half of 8 is 4, and 4 squared is 16.  So we add 16 to both sides.

(x^2-8x+16)=-5+16

We will do the addition on the right, no big deal.  On the left, however, what we have done in the process of completing the square is to create a perfect square binomial, which gives us the h coordinate of the vertex.  We will rewrite with that perfect square on the left and the addition done on the right,

(x-4)^2=11

Now we will move the 11 back over, which gives us the k coordinate of the vertex.

(x-4)^2-11=y

From this you can see that A is correct.

Also we can see that the vertex of this parabola is (4, -11), which is why B is NOT correct.

The axis of symmetry is also found in the h value.  This is, by definition, a positive x-squared parabola (opens upwards), so its axis of symmetry will be an "x = " equation.  In the case of this type of parabola, that "x = " will always be equal to the h value.  So the axis of symmetry is

x = 4, which is why C is NOT correct, either.

We can find the y-intercept of the function by going back to the standard form of the parabola (NOT the vertex form we found by completing the square) and sub in a 0 for x.  When we do that, and then solve for y, we find that when x = 0, y = 5.  So the y-intercept is (0, 5).

From this you can see that D is also correct.

To determine if the parabola has real solutions (meaning it will go through the x-axis twice), you can plug it into the quadratic formula to find these values of x.  I just plugged the formula into my graphing calculator and graphed it to see that it did, indeed, go through the x-axis twice.  Just so you know, the values of x where the function go through are (.6833752, 0) and (7.3166248, 0).  That's why you need the quadratic formula to find these values.

7 0
3 years ago
Last winter, Anne was charged $838.35 for 9,315 KWh of electricity. What did her company charge per killowatt hour of electricit
DaniilM [7]
To solve this do:

838.35/9315= 0.09.

This means the company charged $.09 for every kilowatt of electricity used.
6 0
3 years ago
Thor invests $3000 in an account, with interest compounded continuously. If his investment doubles in value after 7.2 years, wha
sladkih [1.3K]

Answer:

B.  9.6 %.

Step-by-step explanation:

A = P e^rt

His investment doubles so it comes to  3000 * 2 = $6000.

Substituting in the formula>

6000 = 3000e^7.2r   ehere r  is the interest rate.

e^7.2r = 2

Taking logs

7.2r = ln 2

r = ln2 / 7.2

r = 0.096

So the rate is 9.6%.

8 0
3 years ago
How many feet are in 24 yards? A. 2 B. 72 C. 288 D. 8
Alinara [238K]
1 yard=3 feet
24 yards=
24 yards=24 times yards=24 times (3feet)=24 times 3 times feet=72 times feet
<span>72 feet is the answer</span>
8 0
3 years ago
Read 2 more answers
HELPPPP PLEASEEEE will give brainliest ​
ycow [4]

Answer:

I think it's the 3rd or fourth one. I'm not positive tho

8 0
2 years ago
Other questions:
  • Although the earth's orbit about the sun is elliptical, the average distance from the earth to the sun is approximately 93 milli
    12·2 answers
  • -4(v+2)+3v what’s the answer to this
    8·1 answer
  • -3x(4+(-7)) in distributive property
    8·1 answer
  • Complete the ratio table.<br><br> 16 17<br> 32 <br> 51<br> 64 68<br> 80 85
    12·1 answer
  • A wholesaler buys a pair of sunglasses for $5.50 each. He then marks up the wholesale cost 80% to create a retail price for his
    10·1 answer
  • How can I show her numbers are related to each other
    8·1 answer
  • What is the area of the trapezoid in squared meters shown below?
    7·1 answer
  • Add and simplify 9/16+1/2 =
    6·1 answer
  • 1/5 times 8 =? help please asap
    6·1 answer
  • On a coordinate plane, points are at (negative 5, 5), (0, 5), (0, negative 1), and (negative 5, negative 1).
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!