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
kati45 [8]
3 years ago
7

Please help The perimeter of a rectangular shape electronic keyboard is 14 ft. Its width is 3 ft longer than its depth

Mathematics
1 answer:
kipiarov [429]3 years ago
3 0

Answer:

Width = 6ft Area = 54 sq ft

Step-by-step explanation:

First, re-read the problem until you understand it and can put it into your own words.  I re-wrote it like this:  "Find the area of a rectangle by first finding the length (L) and the width (W)."   [note that I added "find L and W," but that is how I'm going to solve the problem;  I could also have said that we will need the formulas, P=2L+2W and A=LW, but you knew that already, right?).

 

Translate the problem:

 "The length of a rectangle is 3 ft longer than its width"      means

         L                             =    3             +         W                 (eq1)

 "the perimeter of the rectangle is 30 ft"     means

            P                                = 30                      (eq2)

 

So, now the math is easy, just find L and W so we can compute the area:

     P = 30 = 2L + 2W                         (eq3; from eq2 and the formula for P)

          30 = 2(3+W)  +  2W              (use eq1 to substitute for L)

          30 = 6 + 2W   + 2W              (distribute)

           30 = 6 + 4W                       (collect terms)

            24 = 4W                        (subtract 6 from both sides)

            6 ft = W                         (divide both sides by 4)

 

Use the easiest equation (either eq1 or else eq3) to find L:

          L = 3 + W        (eq1)

          L = 3 + 6

          L = 9 ft

What is the area (A)?

          A = L*W

          A = (9 ft)*(6 ft)

          A = 54 sq ft

You might be interested in
Can you solve them with points to plot thank you
BigorU [14]

I have solved the first one. Hope this helps

8 0
2 years ago
A square city block has a side length of 563 yards what is the perimeter of the block<br> Block
olga nikolaevna [1]

Answer:

The perimeter is 2252 yards.

Step-by-step explanation:

In a square all sides are equal.

Side = 563 yards

Perimeter = 563 x 4 = 2252 yards.

7 0
3 years ago
Solve for c: c - 12 = 3
vlabodo [156]

Steps to solve:

c - 12 = 3

~Add 12 to both sides

c = 15

Best of Luck!

8 0
3 years ago
Read 2 more answers
Consider the composite function (g (x) ) = StartRoot StartFraction 1 Over x squared minus 3 EndFraction EndRoot. If g(x) = x2 –
balandron [24]

Answer:

answer is c

Step-by-step explanation:

8 0
3 years ago
A line has a rise of 3 and a run of 12. What is the slope?<br><br> 1/3<br> 1/4<br> 4
AnnyKZ [126]
Slope = rise/run
slope = 3/12
slope = 1/4
answer is
<span>1/4</span>
4 0
3 years ago
Read 2 more answers
Other questions:
  • What number is 140% of 15
    9·2 answers
  • How many 0.2 liter glasses of water are contained in a 3.6 liter pitcher
    8·2 answers
  • Ms. Finch is getting new carpet installed in her living room and hallway. The carpet will not be on the stairs. The cost of inst
    9·1 answer
  • Find the value of x.
    7·1 answer
  • I am lost can anyone help
    11·1 answer
  • Ardit left a 18% tip on a $60 restaurant bill. How much money did he leave for the tip?
    7·1 answer
  • The price of a set of headphones that regularly sells for $99 increases by 30 percent. What is the new price for the headphones?
    13·1 answer
  • Please Help Me i will do anything
    13·1 answer
  • The graph shows the cost to rent a snowblower at Rental Depot and ABC Rentals. The cost for each depends on the time it is rente
    6·2 answers
  • The coefficient of x^2 in the expansion of (1+2x)^n is 60. given that n&gt;0, find the value of n.​
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!