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
fomenos
3 years ago
9

The area of rectangular Envelope is given by the trinomial x^2 +8x+7. The length of the envelope is x+7. What is the width of th

e envelope ?
Mathematics
1 answer:
stealth61 [152]3 years ago
7 0
X+1 is the width of the envelope. If you need work just say do in the comments please.
You might be interested in
Solve the system. -3x-y=10; y-4z=-13; x-4y+z=4
kvasek [131]

9514 1404 393

Answer:

  (x, y, z) = (-3, -1, 3)

Step-by-step explanation:

Many graphing calculators can solve matrix equations handily. Here, we use a combination of methods.

Use the last equation to write an expression for z.

  z = 4 -x +4y

Substitute this into the second equation:

  y -4(4 -x +4y) = -13

  y -16 +4x -16y = -13

  4x -15y -3 = 0

In genera form, the first equation can be written as ...

  3x +y +10 = 0

Now, the solution to these two equations can be found to be ...

  x = (-15(10) -1(-3))/(4(1) -3(-15)) = (-150 +3)/(4+45) = -3 . . . using "Cramer's rule"

  y = -(10 +3x) = -(10 -9) = -1 . . . . from the first equation

  z = 4 -(-3) +4(-1) = 3 . . . . . . . . from our equation for z

The solution to the system is (x, y, z) = (-3, -1, 3).

_____

<em>Additional comment</em>

Written as an augmented matrix, the system of equations is ...

  \left[\begin{array}{ccc|c}-3&-1&0&10\\0&1&-4&-13\\1&-4&1&4\end{array}\right]

4 0
3 years ago
Question 3 what is the answer
RSB [31]
The answer is A because since the balance is 325 and you are trying to find what it was before you deposited
5 0
3 years ago
Read 2 more answers
Jenna wants to paint a wooden jewelry box that is 8 inches by 6 inches by 3 inches with clear paint. The bottle of paint says it
Tanzania [10]
Yes. 6x8 equals 48. 48x3 equals 144.
7 0
2 years ago
If a circle has a circumference of 81.64 cm, what is the radius?
ipn [44]

Answer:13cm

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
When given a quadratic equation, how do I graph it, and find the vertex?
NemiM [27]
So let’s say the equation is x^2 (x squared) -4x + 8 = 0. So you have to eventually graph a palabara. So to get the vertex, you have to find the line of symmetry (this plays a big part). So the formula for the line of symmetry is x= -b/2a. So A is this equation is 1. B is -4. C is 8. So you would plug these numbers in and you get 2. So (2,0) is your like of symmetry. Now you have to plug 2 back in for x. So when you do that you get 4 so the vertex is (2,4). So the vertex is (2, 4) and basically what the vertex is is it is the highest or lowest point of a palabara. So you can tel if it opens up or down by looking is A is negative or positive. If A is negative the it opens down. If it is positive then it opens up. So now you just put points in. Create a t chart. Like x/y. So when X is 1 for example, y is 5. So you graph (1, 5) and you graph the point that is the same distance from the line of symmetry. You do this until you have 5 points. I hope this helps. It’s hard to teach this over text.
4 0
3 years ago
Other questions:
  • A puppy and a kitten are 180 meters apart when they see each other. The puppy can run at a speed of 25 m/sec, while the kitten c
    8·2 answers
  • Complete the table to investigate dilations of exponential functions.
    11·1 answer
  • Mrs. Hanson has 2 pies for a party. She calculates that if she splits the pies evenly among the guests, they will each receive 1
    7·2 answers
  • when four coins are tossed simultaneously then what is the probability of getting two heads and two tails​
    7·1 answer
  • This year it snowed on five of the 12 days of Christmas the snow amounts were 3 inches ,5 inches ,7 inches ,1 foot and 9 inches
    14·1 answer
  • Lindsay used two points, (x 1, y 1) and (x 2, y 2), to find the equation of the line, y = mx + b, that passes through the points
    7·2 answers
  • algebraically determine the values of h and k to correctly complete the identity stated below : 2 x cubed - 10x squared + 11x -
    5·1 answer
  • Need help with 7 and 8
    11·1 answer
  • Use the drawing tool(s) to form the correct answers on the provided graph.
    15·2 answers
  • the radius of the circle shown to the right is 3 inches. What is the area of this circle, in square inches?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!