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Citrus2011 [14]
3 years ago
7

A square has an area of 81 cm.(squared)What is the length of each side?

Mathematics
2 answers:
Andrej [43]3 years ago
6 0

Answer:

9

Step-by-step explanation:

vazorg [7]3 years ago
4 0

Answer:

9

Step-by-step explanation:

It would be 9 cause nine times nine is 81.

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Which expression is equivalent to (7x+9y)2
Arada [10]

Answer:

49x^2+126xy+81y^2

Step-by-step explanation:

Use the square of a binomial theorem

(a+b)^2= a^2+2ab+b^2

Now expand the given equation:

(7x+9y)^2=49x^2+126xy+81y^2

Hope this helps :)

Have a great day!

6 0
2 years ago
Are the equations 3x= -9 and 4x= -12 equivalent
Hitman42 [59]
Yes they are equivalent. You get -3 when you try solving the actual equation.
5 0
3 years ago
After 3/4 of a minute a sloth has moved just 3/8 of a foot. what is the sloth's speed in feet per minute
Delicious77 [7]
Hello! 

So 4/4 - 3/4 = 1/4 (a quarter). So we have to find a quarter of 3/8 and add it to 3/8. First of all, we have to convert 1/4 to a percentage. The answer is 25%. 3/8 as a decimal is 0.375. 25% of 0.375 = (0.25 x 0.375 =) 0.09375. 
0.09375 + 0.375 = 0.46875. 
Now, we have to convert 0.46875 back into a fraction. 

So the answer is 5/64.

Have a great day! :)
3 0
3 years ago
Find the value of the given expression.<br> (see the image)
Andrews [41]

Answer:

d. 14

Step-by-step explanation:

  1. 3(2) = 3 × 2 = 6
  2. Plug 6 in: 12 + {10 ÷ [11 - 6]}
  3. 11 - 6 = 5
  4. Plug 5 in: 12 + {10 ÷ 5}
  5. 10 ÷ 5 = 2
  6. Plug 2 in: 12 + 2
  7. 12 + 2 = 14

I hope this helps!

7 0
3 years ago
Form the intersection for the following sets.
a_sh-v [17]
The intersection is where the sets overlap. picture a Venn diagram (two overlapping circles). The intersection is only the overlap part. So for this problem that would be C. {20}
5 0
3 years ago
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