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
irinina [24]
2 years ago
12

A rectangle has a length of x+5 and a width of 2x-9. Using the formula for the perimeter of a rectangle , P=2L + 2W, write an ex

pression to represent the perimeter of the rectangle in simpliest form.
HELP PLEASE OMG.​
Mathematics
2 answers:
seraphim [82]2 years ago
4 0
16 length height bc it’s a triangle so the triangle will be 17 feet tall and long
Katyanochek1 [597]2 years ago
4 0

As you stated the formula of a rectangle is P (perimeter) = 2W (the two widths added together) + 2L (the two lengths added together).

To solve this algebraicly you need to define your variable, or unknown, which in this case is the width or "W".

Now set this same equation with any symbol you wish, "x" is often used, and solve for x. You could keep W instead of X also if it makes it easier to work the problem.

P= 2x + 2L

isolate the 2x by subtracting 2L from both sides.

P-2L=2x

Now isolate the x by dividing both sides by 2 and you have

P-2L/2=x

x will be W. Just put in the numbers of P and L and you will have solved for W.

You might be interested in
A man walks due east for 4km, he then changes direction and walks on a bearing on a bearing of 197° until he is south west of hi
Fed [463]

Answer:

13.08 ≈ y

Step-by-step explanation:

7 0
3 years ago
Find an n^th degree polynomial with real coefficients satisfying the given conditions. n = 3; -2 and 2 i are zeros; f(-1) = 15.
Ira Lisetskai [31]
So, n = 3, is a 3rd degree polynomial, roots are -2 and 2i

well 2i is a complex root, or imaginary, and complex root never come all by their lonesome, their sister is always with them, the conjugate, so if 0+2i is there, 0-2i is there too

so, the roots are -2, 2i, -2i

now... \bf \begin{cases}
x=-2\implies x+2=0\implies &(x+2)=0\\
x=2i\implies x-2i=0\implies &(x-2i)=0\\
x=-2i\implies x+2i=0\implies &(x+2i)=0
\end{cases}
\\\\\\
(x+2)\underline{(x-2i)(x+2i)}=0\\\\
-----------------------------\\\\
\textit{difference of squares}
\\ \quad \\
(a-b)(a+b) = a^2-b^2\qquad \qquad 
a^2-b^2 = (a-b)(a+b)\\\\
-----------------------------\\\\
(x+2)[x^2-(2i)^2]=0\implies (x+2)[x^2-(2^2i^2)]=0
\\\\\\
(x+2)[x^2-(4\cdot -1)]=0\implies (x+2)(x^2+4)=0
\\\\\\
x^3+2x^2+4x+8=0

now, if we check f(-1), we end up with 5, not 15
hmmm

so, how to turn our 5 to 15? well, 3*5, thus

\bf 3(x^3+2x^2+4x+8)=f(x)\implies 3(5)=f(-1)\implies 15=f(-1)

usually, when we get the roots, or zeros, if any common factor that is a constant is about, they get in a division with 0 and get tossed, and aren't part of the roots, thus, we can simply add one, in this case, the common factor of 3, to make the 5 turn to 15
6 0
3 years ago
A glacier in Alaska moves about 29.9 meters a day. About how much farther will mobe in 1,000 days than it will move in 100 days
Reptile [31]

Answer:

26,910 meters

Step-by-step explanation:

The glacier moves 29.9 meters a day.

In 100 days it will move 29.9(100)=2990 meters.

In 1000 days it will move 29.9(1000)=29900 meters.

29,900-2,990=26,910 meters

7 0
3 years ago
Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the
VladimirAG [237]

Answer:

\boxed{108\sqrt{3}\text{ in}^{2}}

Step-by-step explanation:

An apothem is a perpendicular drawn from the centre of the triangle to one of its sides.

The three apothems OD, OE, and OF divide  ∆ABC into six smaller congruent triangles.

1. Area of ∆OCD

CotOCD = OD/OC

cot30 = CD/6

√3 = CD/6

CD = 6√3

A= ½bh

A = ½ × 6√3 × 6 = 18√3  in²

2. Area of ∆ABC

A = 6 × area of ∆OCD = 6 × 18√3 = 108√3 in²

\text{The area of the triangle is }\boxed{108 \sqrt{3} \text{ in}^{2}}

7 0
3 years ago
Read 2 more answers
F(x)=(2x+3)(x-2) and g(x)=2x2-16. Find g(x)-f(x)
babymother [125]
G(x) - f(x) = -x - 10

First, simplify f(x).
(2x+3)*(x-2) = 2x^2 + x - 16

Next, subtract.

    2x^2       - 16
-   2x^2 + x -   6
---------------------
              - x - 10

The answer is -x -10    assuming that g(x) is 2x^2 - 6
4 0
3 years ago
Other questions:
  • Identify the pattern 192,96
    8·1 answer
  • Simplify the following expression
    6·2 answers
  • Natasha had d dollars. She bought 2 ice cream cones which cost x dollars each. How much money does she have left?
    8·1 answer
  • Solve sx+tx=r for x?
    11·1 answer
  • If f(X) = (3x+7)^2, then f(1)? A. 10 <br> B. 16 <br> C. 58 <br> D. 79 <br> E. 100
    7·1 answer
  • Ir AB - 4x + 9. BC = 5x + 2, and AC - 56. then find the value for x, AB, BC.
    6·2 answers
  • Write the following expression in standard place-value form.
    7·1 answer
  • Is the function odd, even or neither?​
    15·1 answer
  • PLEASE HELP ME I NEED THIS IN 15 MINUTES!!!
    14·1 answer
  • Find the slope given the table of values
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!