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telo118 [61]
3 years ago
5

Calculate the perimeter of a square length of whose side is 40cm​

Mathematics
1 answer:
Verizon [17]3 years ago
8 0

Answer:

160 cm

Step-by-step explanation:

a square has 4 equal sides. if one of the sides is 40 cm, then all of the other sides are 40 cm as well. to get a perimeter, you add up the lengths of all the sides. if there are 4 sides of 40 cm, you multiply 40 by 4 to get 160, finally add the unit to get 160 cm.

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If (n+1)!=90×(n-1)!,find n.​
Helen [10]

 

\displaystyle\bf\\(n+1)!=90\times (n-1)!\\\\(n-1)!\times n\times(n+1)=90\times (n-1)!~~~\Big|~:(n-1)!\\\\n(n+1)=90\\\\n(n+1)=9\times10\\\\n(n+1)=9(9+1)\\\\\implies~~\boxed{\bf n=9}

 

4 0
3 years ago
What is the difference in length between a 11/4 inch button and a 3/8 inch button
Nutka1998 [239]

Answer:

\frac{19}{8}

Step-by-step explanation:

First, multiply the two denominators together to get the shared denominator, which will allow you to actually subtract the two numbers. 4 × 8 = 32, so the shared denominator will be 32.

Then, cross-multiply. 11 × 8 = 88, so \frac{11}{4} becomes \frac{88}{32}. 3 × 4 = 12, so \frac{3}{8} becomes \frac{12}{32}.

Now, you can subtract.  \frac{88}{32} -\frac{12}{32} =\frac{76}{32}

Finally, simplify. \frac{76}{32} =\frac{19}{8}. The final difference is \frac{19}{8}.

4 0
3 years ago
Given the Arithmetic series A1+A2+A3+A4
andreev551 [17]
The answer would be 185 bc if you add all of them up that’s what u get
3 0
3 years ago
How do I find this formula?<br><br> Trapizoid:b1=3 m;b2=4 m;A=7m2
DochEvi [55]
That depends. What are you trying to find? The formula for the perimeter? The formula for the area?
8 0
4 years ago
Read 2 more answers
When 1,000 children were inoculated with a certain vaccine, some developed inflammation at the site of the inoculation and some
Dima020 [189]

Answer: C

Step-by-step explanation: C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

Total: 1000

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Total who did not have fever: 980

As 880 not fever and not inflamation, 980 - 880 = 100

So, 100 had inflamation but not fever.

We need the 2 statements and they alone do not answer the question

3 0
3 years ago
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