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
lorasvet [3.4K]
3 years ago
11

Even would be helpful if you just gave me the equation to solve it and I can do the rest. mart had a sale for labor day on DVD's

and video tapes. Katie bought 2 tapes and 3 DVD's and spent 134$. Emily bought 1 tape and 5 DVD's and spent 179$. How much does a tape and DVD cost .
Mathematics
1 answer:
erastova [34]3 years ago
6 0

x - price of a video tape

y - price of a DVD

\left\{\begin{array}{ccc}2x+3y=134\\x+5y=179&|\text{subtract 5y from both sides}\end{array}\right\\\\\left\{\begin{array}{ccc}2x+3y=134\\x=179-5y&|\text{substitute to the first equation}\end{array}\right\\\\2(179-5y)+3y=134\qquad\text{use distributive property}\\\\(2)(179)+(2)(-5y)+3y=134\\\\358-10y+3y=134\qquad\text{subtract 358 from both sides}\\\\-7y=-224\qquad\text{divide both sides by (-7)}\\\\\boxed{y=32}\\\\\text{Put the value of y to the second equation}\\\\x=179-5(32)\\\\x=179-160\\\\\boxed{x=19}

<h3>Answer: video tape cost $19 and DVD cost $32.</h3>
You might be interested in
6. Find the sum or difference.<br> 146<br> 155<br> a. +<br> 8<br> 8
Ipatiy [6.2K]
19191020202929293994494944
5 0
3 years ago
Locate the absolute extrema of the function on the closed interval:<br> y = 3x^(2/3) - 2x, [-1, 1]
Alecsey [184]
To get the extrema, derive the function.
You get y' = 2x^-1/3 - 2.
Set this equal to zero, and you get x=0 as the location of a critical point.
Since you are on a closed interval [-1, 1], those points can also have an extrema.
Your min is right, but the max isn't at (1,1). At x=-1, you get y=5 (y = 3(-1)^2/3 -2(-1); (-1)^2/3 = 1, not -1).
Thus, the maximum is at (-1, 5).
7 0
3 years ago
A recent trend in advertising is viral marketing. The goal is to convince viewers to share an amusing advertisement by e-mail or
77julia77 [94]
I'm not sure what you are looking for but I'll answer this question based on what I think is needed.

Given:
Day 1: 130 
Day 2: 130 x 4 = 520
Day 3: 520 x 4 = 2,080

The exponential equation of this problem is:
V(n) = 130(4)^n

Where n is the number of days since the video was first shown.

Let us assume that 10 days have past. Total view would be:

V(n) = 130(4)^n

V(10) = 130(4)^10
V(10) = 130(1,048,576)
V(10) = 136,314,880

After 10 days, there are more than 136 Million views of the viral video.



5 0
3 years ago
The function f is defined by f(x) = (x + 3)(x + 1).
blsea [12.9K]

Answer:

Below in bold.

Step-by-step explanation:

The  zeroes ( = x-intercepts) are x = -3 and x = -1.

So the x -coordinate of the vertex is between x = -3 and x = -1.

The actual x-coordinate is halfway between these value: at x = -2.

7 0
3 years ago
Read 2 more answers
3[5x - 4] - [-30 - 45x]
Nimfa-mama [501]
3(5x - 4) - (-30-45x)
= 15x - 12 + 30 + 45x <- Distributive Property
=60x + 18 <- Combine Like Terms

If you're trying to solve for 0:

0 = 60 x + 18
-18 = 60x <- Subtracted 18 from both sides
x = \frac{-18}{60} = \frac{-9}{30} <- Divided both sides by 60 and then simplified.

x = \frac{-9}{30} <- Fraction Form
x = -0.3 <- Decimal Form

Give Brainliest for simple answer plz :P
3 0
3 years ago
Read 2 more answers
Other questions:
  • 15/16 divided by 3/4 = ?
    6·1 answer
  • Which of the following is not a condition that must be met before you can use the quadratic formula to find the solutions of an
    15·1 answer
  • Solve for r: A = 2 πrh​
    12·1 answer
  • Plz help and thank you!
    6·1 answer
  • A 13tf.ladder is leaning against the house. The top of the ladder touches the house at 10 feet above the ground.How far away is
    12·1 answer
  • A group of students formed a circle during a game. The circumference of the circle was about 43.96 feet, and the diameter of the
    13·1 answer
  • The diagram shows the locations of Noah and Ben after swimming in different directions from a
    6·1 answer
  • -3(n + 3)=12 the solution is n =
    9·2 answers
  • HELP PLEASE
    14·1 answer
  • PLEASE HELP ME WITH THIS
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!