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
Virty [35]
3 years ago
12

a rectangular deck has a area of 320 ft squared. the length of the desk is 4 feet longer than the width. find the dimensions of

the desk. Solve by completing the square.
Mathematics
1 answer:
Anon25 [30]3 years ago
3 0
Because l•w= area, area= 320, l=w+4
width • (width +4)= 320

Distribute the multiplication over addition and move all to the left side.
w^2 +4w-320=0
(w-16)•(w+20)=0 yet, The product of two things is 0 if one is 0 or both are 0 so
w-16=0 so w=16 and
w+20=0 so w= -20

Now the width or length could not be negative so we discard the solution w=-20.

Answer
width= 16 inches
length =16+4=20

Verify
w•l=320
16•20=320✔️





You might be interested in
1. (2k2+7k4+3) + (2k2-6+6k4)
stellarik [79]

<em><u>Hope</u></em><em><u> </u></em><em><u>this</u></em><em><u> </u></em><em><u>will</u></em><em><u> </u></em><em><u>help</u></em><em><u> </u></em><em><u>u</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>:</u></em><em><u>)</u></em>

<em><u>✌</u></em><em><u>✌</u></em><em><u>✌</u></em><em><u>✌</u></em><em><u>✌</u></em><em><u>✌</u></em>

4 0
3 years ago
Read 2 more answers
frank is wrapping a present. the box measures 6 cm wide by 9 cm long by 5.1 cm tall.what amount of wrapping paper,not counting o
Montano1993 [528]
(2 × (6cm x 9cm)) + (2 × (6cm x 5.1cm)) + (2 × (9cm x 5.1cm)) = 261 square cm
3 0
3 years ago
The temperature today was 10 degrees colder than twice yesterday's temperature, t.
Aneli [31]

Answer:  Today's temperature : 2t -10

Step-by-step explanation:

Hi, to write the expression of the statement given we have to analyze each phrase:

<em>Twice yesterday's temperature, t.</em> If t is yesterday’s temperature, twice that temperature equals 2t.

<em>The temperature today was 10 degrees colder than</em>: It means that we have to subtract 10 degrees :(-10)

Mathematically speaking:

Today's temperature : 2t -10

where t = yesterday's temperature

Feel free to ask for more if needed or if you did not understand something.

5 0
3 years ago
Carla has 4 packages of socks, and Jenna has 1 package of socks. Each package has 6 pairs of socks. Carla found the total number
Ede4ka [16]
The correct answer is D because you would multiply the numbers in the bracket by 6 which would equal to 30
4 0
3 years ago
What is the equation of the parabola?
Stella [2.4K]

Answer:

Option D.

Step-by-step explanation:

The vertex form of a parabola along y-axis is

y=a(x-h)^2+k      ...(1)

where, (h,k) is vertex and a is a constant.

From the given graph it is clear that the vertex of the parabola is (0,2). So, h=0 and k=2.

y=a(x-0)^2+2

y=ax^2+2    ...(2)

The graph passing through (6,5). Substitute x=6 and y=5 in the above equation.

5=a(6)^2+2

5-2=36a

3=36a

\frac{3}{36}=a

\frac{1}{12}=a

Substitute a=\frac{1}{12} in equation (2).

y=\frac{1}{12}x^2+2

Therefore, the correct option is D.

8 0
3 years ago
Other questions:
  • Please help me with this question
    15·2 answers
  • For value of x is 6x-3&gt;4x+5
    15·1 answer
  • Solve the equation 5n+7=21
    7·2 answers
  • I need help please!!!!!!!
    6·1 answer
  • 5 divide 3/4 and simply
    6·2 answers
  • Evaluate 9x - 11 for x = -3 and x = 7.
    6·1 answer
  • Combine like terms.
    5·1 answer
  • What is 10% of 10000
    12·1 answer
  • What is the graph of each function rule? 2x²– 2​
    13·1 answer
  • The wholesale price for a desk is $195 A certain furniture store marks up the wholesale price by 30% . Find the price of the des
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!