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
Rom4ik [11]
3 years ago
12

4. The length of a rectangle is 4 more than its width. The perimeter of the rectangle is 60cm.

Mathematics
1 answer:
sergey [27]3 years ago
3 0

Step-by-step explanation:

let width = w

if width = w, then length = w + 4

Therefore the perimeter is 2w + 2(w+4)

2w + 2(w+4) = 4w + 8

perimeter = 60cm

4w + 8 = 60

<em>-8</em>

4w       = 52

<em>divide each side by 4</em>

w = 13

length = w+4

therefore, length = 17

You might be interested in
A: x ≤ 6<br> B: x ≥ 8<br> C: x ≥ – 8<br> D: x ≤ – 8
ASHA 777 [7]

Answer:

I believe the answer you are looking for is C

Step-by-step explanation:


6 0
3 years ago
Through (2,2) slope 3/2
Mrac [35]

Answer:

no info given :/

Step-by-step explanation:

...... ....

4 0
3 years ago
I WILL MARK BRAINLIEST! :3<br> Find the total cost.<br> Purchase price= $2615 Tax rate= 3%
balu736 [363]

Answer:

78.45

Step-by-step explanation:

u know 3 as decimal is 0.03 so u multiply 2,615*0.03 which is 78.45

8 0
3 years ago
How to get a perimeter of 200
Gnom [1K]

Answer:

You could have a square with side of 50 ft.

Step-by-step explanation:

4 0
3 years ago
A teacher places n seats to form the back row of a classroom layout. Each successive row contains two fewer seats than the prece
Alex_Xolod [135]

Answer:

The number of seat when n is odd S_n=\frac{n^2+2n+1}{4}

The number of seat when n is even S_n=\frac{n^2+2n}{4}

Step-by-step explanation:

Given that, each successive row contains two fewer seats than the preceding row.

Formula:

The sum n terms of an A.P series is

S_n=\frac{n}{2}[2a+(n-1)d]

    =\frac{n}{2}[a+l]

a = first term of the series.

d= common difference.

n= number of term

l= last term

n^{th} term of a A.P series is

T_n=a+(n-1)d

n is odd:

n,n-2,n-4,........,5,3,1

Or we can write 1,3,5,.....,n-4,n-2,n

Here a= 1 and d = second term- first term = 3-1=2

Let t^{th} of the series is n.

T_n=a+(n-1)d

Here T_n=n, n=t, a=1 and d=2

n=1+(t-1)2

⇒(t-1)2=n-1

\Rightarrow t-1=\frac{n-1}{2}

\Rightarrow t = \frac{n-1}{2}+1

\Rightarrow t = \frac{n-1+2}{2}

\Rightarrow t = \frac{n+1}{2}

Last term l= n,, the number of term =\frac{ n+1}2, First term = 1

Total number of seat

S_n=\frac{\frac{n+1}{2}}{2}[1+n}]

    =\frac{{n+1}}{4}[1+n}]

     =\frac{(1+n)^2}{4}

    =\frac{n^2+2n+1}{4}

n is even:

n,n-2,n-4,.......,4,2

Or we can write

2,4,.......,n-4,n-2,n

Here a= 2 and d = second term- first term = 4-2=2

Let t^{th} of the series is n.

T_n=a+(n-1)d

Here T_n=n, n=t, a=2 and d=2

n=2+(t-1)2

⇒(t-1)2=n-2

\Rightarrow t-1=\frac{n-2}{2}

\Rightarrow t = \frac{n-2}{2}+1

\Rightarrow t = \frac{n-2+2}{2}

\Rightarrow t = \frac{n}{2}

Last term l= n, the number of term =\frac n2, First term = 2

Total number of seat

S_n=\frac{\frac{n}{2}}{2}[2+n}]

    =\frac{{n}}{4}[2+n}]

     =\frac{n(2+n)}{4}

    =\frac{n^2+2n}{4}  

4 0
3 years ago
Other questions:
  • a bus driver makes a stop at 2:30, letting off 15 people and letting on 9 .the bus makes another stop ten minutes later to let o
    14·1 answer
  • At a baseball game, a vender sold a combined total of 104 sodas and hot dogs. the number of sodas sold was three times the numbe
    12·1 answer
  • What equation represents the slope - intercept form of the line below? y- intercept= (0,-5) slope= 3
    12·2 answers
  • Which represents the square of the sum of a number and 4 is 36
    13·1 answer
  • 0.18(y-9)+0.06y=0.04y-0.9
    8·1 answer
  • In triangle XYZ, XY = 14, YZ = 22, and XZ = 26. What is the measure of angle Z to the nearest degree?
    12·1 answer
  • 56,426+17,895
    7·2 answers
  • ANSWER ASAP PLSSS
    12·1 answer
  • Find the exact value of tan A in simplest radical form.<br> В B.<br> 14<br> 10<br> с<br> A<br> 196
    14·1 answer
  • Please help with this.
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!