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
siniylev [52]
3 years ago
15

A store sells 3 videotapes for $4.99. find the unit rate

Mathematics
1 answer:
iogann1982 [59]3 years ago
7 0
1.66333333 because u divide 4.99 by 3 to get the value of one
You might be interested in
In Exercises 40-43, for what value(s) of k, if any, will the systems have (a) no solution, (b) a unique solution, and (c) infini
svet-max [94.6K]

Answer:

If k = −1 then the system has no solutions.

If k = 2 then the system has infinitely many solutions.

The system cannot have unique solution.

Step-by-step explanation:

We have the following system of equations

x - 2y +3z = 2\\x + y + z = k\\2x - y + 4z = k^2

The augmented matrix is

\left[\begin{array}{cccc}1&-2&3&2\\1&1&1&k\\2&-1&4&k^2\end{array}\right]

The reduction of this matrix to row-echelon form is outlined below.

R_2\rightarrow R_2-R_1

\left[\begin{array}{cccc}1&-2&3&2\\0&3&-2&k-2\\2&-1&4&k^2\end{array}\right]

R_3\rightarrow R_3-2R_1

\left[\begin{array}{cccc}1&-2&3&2\\0&3&-2&k-2\\0&3&-2&k^2-4\end{array}\right]

R_3\rightarrow R_3-R_2

\left[\begin{array}{cccc}1&-2&3&2\\0&3&-2&k-2\\0&0&0&k^2-k-2\end{array}\right]

The last row determines, if there are solutions or not. To be consistent, we must have k such that

k^2-k-2=0

\left(k+1\right)\left(k-2\right)=0\\k=-1,\:k=2

Case k = −1:

\left[\begin{array}{ccc|c}1&-2&3&2\\0&3&-2&-1-2\\0&0&0&(-1)^2-(-1)-2\end{array}\right] \rightarrow \left[\begin{array}{ccc|c}1&-2&3&2\\0&3&-2&-3\\0&0&0&-2\end{array}\right]

If k = −1 then the last equation becomes 0 = −2 which is impossible.Therefore, the system has no solutions.

Case k = 2:

\left[\begin{array}{ccc|c}1&-2&3&2\\0&3&-2&2-2\\0&0&0&(2)^2-(2)-2\end{array}\right] \rightarrow \left[\begin{array}{ccc|c}1&-2&3&2\\0&3&-2&0\\0&0&0&0\end{array}\right]

This gives the infinite many solution.

5 0
3 years ago
Eight inches of snow fell in five hours. Write the number of inches per hour.
DedPeter [7]

The answer is 1.6

How I figured it out:

I divided 8 by 5, which gave me 1.6

To make sure this was right, I multiplied 1.6 by 5, which gave me an answer of 8 or other known as 8 inches.

In conclusion, the number of inces per hour is 1.6

6 0
3 years ago
Least common denominator of 1/10 and 3/5
Alisiya [41]

Answer:

It's 10

Step-by-step explanation:

10 can be divided by five and 5 can also be divided by five and it's the least number that can be divided by five.

6 0
3 years ago
I Am A Number That Is Double The Product Of 2 And 7. One Of My Factors Is 7 What Is My Other factor
tatyana61 [14]
If 7 × 2 = 14, then 14 + 14 = 28. So, 7 times 4 equals to 28. You can add 14 + 14 or multiply 7 and 4 to get your answer.
7 0
3 years ago
What is the ordered pair of (0,2)
wel

Given, (0,−2).

Since the x-coordinate is 0, the point clearly lies on y-axis.

Also, the y-coordinate −2 being negative, the point lies on the negative y-axis.

3 0
3 years ago
Other questions:
  • Recall what you know about similarity. If circle B is similar to circle A, what must exist?
    15·2 answers
  • A circle graph shows what about a data set?
    13·2 answers
  • Fill in the blanks to make the solution correct: <br> 5._4 - (_.8_)=-3.61
    13·1 answer
  • Which quadratic function has one real solution? 0 = 2(x + 7)(x – 5) 0 = (x – 3)(x – 3) 0 = 2.4(x – 2)(x + 2) 0 = (x – 2)(x – 1)
    11·2 answers
  • 52 thousandths in scientific notation
    11·1 answer
  • On a flight from New York to London, an airplane travels at a constant speed. An equation relating the distance traveled in mile
    9·1 answer
  • Factor completely 2x^3+6x^2+10x+30
    9·2 answers
  • POSSIBLE POINTS: 28.57
    11·1 answer
  • You enter a room. 2 dogs, 4 horses, one giraffe, and a duck are laying on a bed. 3 chicken are flying over a chair. How many leg
    14·1 answer
  • The plane flies from Melbourne to Tokyo at an average speed of 783 km/h The distance from Melbourne to Tokyo is 8352 km. The pla
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!