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
-BARSIC- [3]
3 years ago
13

The length of a rectangle is 20 inches less than twice the width. The perimeter of the rectangle is 86 inches. Find the dimensio

ns of the rectangle.
Mathematics
1 answer:
masha68 [24]3 years ago
4 0

Answer:

length=22

width=21

Step-by-step explanation:

let, length be x and width be y.

x=2y-20

2(x+y)=86

or, 2(2y-20+y)=86

or, 2(3y-20)=86

or, 6y-40=86

or, 6y= 126

or, y= 126/6

y= 21

x= 2×21-20 = 42-20 =22

You might be interested in
Find the first partial derivatives of the function f(x,y,z)=4xsin(y−z)
Amanda [17]

Answer:

f_x(x,y,z)=4\sin (y-z)

f_x(x,y,z)=4x\cos (y-z)

f_z(x,y,z)=-4x\cos (y-z)

Step-by-step explanation:

The given function is

f(x,y,z)=4x\sin (y-z)

We need to find first partial derivatives of the function.

Differentiate partially w.r.t. x and y, z are constants.

f_x(x,y,z)=4(1)\sin (y-z)

f_x(x,y,z)=4\sin (y-z)

Differentiate partially w.r.t. y and x, z are constants.

f_y(x,y,z)=4x\cos (y-z)\dfrac{\partial}{\partial y}(y-z)

f_y(x,y,z)=4x\cos (y-z)

Differentiate partially w.r.t. z and x, y are constants.

f_z(x,y,z)=4x\cos (y-z)\dfrac{\partial}{\partial z}(y-z)

f_z(x,y,z)=4x\cos (y-z)(-1)

f_z(x,y,z)=-4x\cos (y-z)

Therefore, the first partial derivatives of the function are f_x(x,y,z)=4\sin (y-z), f_x(x,y,z)=4x\cos (y-z)\text{ and }f_z(x,y,z)=-4x\cos (y-z).

4 0
3 years ago
Tea from Britain costs $2.50 to produce. It is sold in America at a price of $3.50 (to make a profit of $1.00) Tea in America co
jok3333 [9.3K]

Answer:

I would buy my tea from Britain.

7 0
3 years ago
Antonio and his family ordered a meal that cost $20. Antonio paid 5% sales tax and left a 15% tip on $20. What was the total cos
dsp73
The total would be 24 dollars.
6 0
3 years ago
Does anyone know how to do 15 and 16?????
Julli [10]
This is how you answer number 15 and 16

3 0
3 years ago
Read 2 more answers
ali's tyre pressure gauge shows a reading witch is 8 % lower than the actual pressure when the gauge shows 33.58
Rama09 [41]

Answer:

the actual pressure is 31.09

Complete question:

What is the actual pressure when Ali's gauge shows 33.58

Step-by-step explanation:

Given,

Ali's tyre presser gauge show a reading 8% higher than the actual pressure.

Ali's gauge shows 33.58.

Let the actual pressure be x.

According to problem,

 x\times\frac{108}{100} =33.58 { [If 8% increasing  of a no ⇒ The number becomes =                      (\frac{100+8}{100})of the number}

x= \frac{33.58\times100}{108}

x=31.09

Therefore, the actual pressure is 31.09

5 0
3 years ago
Other questions:
  • Ken can walk 40 dogs in 8 hours.<br> How many dogs can Ken walk in 12 hours?
    14·1 answer
  • In 1983 the composition of pennies in the United States was changed due, in part, to the rising cost of copper. Pennies minted a
    9·1 answer
  • Determine the surface area of a sphere with radius 2 meters. Question 12 options: A) 24.2 m2 B) 16 m2 C) 50.3 m2 D) 32 m2
    15·1 answer
  • What is 3/4 hundredths as a decimal?​
    12·2 answers
  • Please help me- thank you
    15·1 answer
  • If -10x – 9y = -7 is a true equation, what would be the value of<br> -30x – 27y?
    14·1 answer
  • Plz help due tomorrow
    9·1 answer
  • Which expression is the result of factoring the expression below by taking out its greatest common factor? 16x^2-8x=? Choose 1 a
    9·1 answer
  • Please help me quick please solve in inequality form
    9·1 answer
  • Please helppp , 20 points for this question
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!