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
Iteru [2.4K]
3 years ago
12

A rectangle has a perimeter of 80 inches. Write an equation to represent the area A in terms of width w.

Mathematics
1 answer:
KiRa [710]3 years ago
6 0

Answer:

A = 40w-w^2      

Step-by-step explanation:

We are given the following in the question:

Perimeter of rectangle = 80 inches.

Let l be the length and w be the width of rectangle.

Perimeter of rectangle =

P= 2(l+w)

Putting values, we get,

80 = 2(l+w)\\40 = l+w\\\Rightarrow l = 40 - w

Now, we have to find the area of the rectangle in terms of w.

Area of rectangle =

A = l\times w

Putting values, we get

A = (40-w)w\\A = 40w-w^2

is the required expression of area of rectangle in terms of w.

Yes, the perimeter is used to calculate the length of the rectangle in the term of w.

You might be interested in
PLEASE I'M falling in math class, please help me please ​
Mariulka [41]

Answer:

Plane R

Plane DEG

Plane FDG

Plane FEG

Step-by-step explanation:

You can name the plane by the script letter "R", and you can name the plane with any three co-linear points on the plane

6 0
2 years ago
Find the slope of the given points (6, -10) and (-15, 15). Show your work.
charle [14.2K]

Answer:

Step-by-step explanation:

The slope of a line between two points can be calculated by dividing the difference of y values by the difference of x values

in this case

m = \frac{y_2-y_1}{x_2-x_1} = \frac{15-(-10)}{-15-6} = \frac{25}{-21} = \frac{-25}{21}

6 0
3 years ago
Help on math? Thanks
Anuta_ua [19.1K]
C is the answer

Dmmssmsmsmxmxxmxm
5 0
3 years ago
In the right triangle shown, A= 30° and AB = 8.
zloy xaker [14]

Answer:

BC=4\ units

Step-by-step explanation:

The picture of the question in the attached figure

we know that

sin(30^o)=\frac{BC}{AB} ----> by SOH (opposite side divided by the hypotenuse)

we have

AB=8\ units\\\\sin(30^o)=\frac{1}{2}

solve for BC

BC=sin(30^o)(AB)

substitute the values

BC=(\frac{1}{2})(8)

BC=4\ units

4 0
2 years ago
Which of the following is an arithmetic sequence?
gladu [14]

Answer:

  A.  3, 0, -3, -6

Step-by-step explanation:

The sequence with constant first differences is an arithmetic sequence. The sequence of A has a common difference of -3, so is an arithmetic sequence.

6 0
3 years ago
Other questions:
  • If the shape in the diagram rotates about the dashed line, which three-dimensional object will be formed?
    6·3 answers
  • Coefficient variables and power?
    13·1 answer
  • Solve the inequality
    8·1 answer
  • What type of triangle is this
    7·2 answers
  • If a cube-shaped cell is 3 units tall by 3 units wide and 3 units long, what is the cell's surface-area-to volume ratio?
    11·1 answer
  • Your cell phone bill is automatically deducting $32 from your bank account every month. How much will the deductions total for t
    6·1 answer
  • 5) Write the 5 number summary and draw a box and whisker plot.<br> 58, 67, 44, 72,51, 42, 60, 46, 69
    8·1 answer
  • A school guidance counselor is researching the number of high school students who have a part-time job. She emails a survey to 5
    9·1 answer
  • Part A
    11·1 answer
  • The length of a rectangle is 2 cm less than twice the width. The area of the rectangle is 112 cm2. Find the length and width of
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!