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Ostrovityanka [42]
2 years ago
6

URGENT! In ABC. what is the value of r?

Mathematics
1 answer:
Bond [772]2 years ago
3 0

Answer:

16.2

Step-by-step explanation:

By geometric mean theorem:

{9}^{2}  = 5(x) \\  \\  \implies \: 81 = 5x \\  \\  \implies \:  x=  \frac{81}{5}  \\  \\ \implies \:  x=16.2

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Find the number by which 4732 should be divided to get perfect square.
ElenaW [278]

Answer:

The required number is 7.

Dividing by this gives the perfect square 676.

Step-by-step explanation:

Finding the prime factors:

2) 4732

2) 2366

7) 1183

13)169    

     13

So 4372

= 2^2 * 7 * 13^2

= 4 *169 * 7

= 676 * 7

Now 676 is a perfect square so the answer is 7.

= 1283 * 4.

Answer is 1283.

8 0
3 years ago
Esmerelda is five times as old as Ruth. Four years ago, the sum of their ages was 22 years. How old is each now?
Lina20 [59]

Answer:

Ruth is  x+4=7/3+4,   esmerelda  is  5x+4=35/3+4

Step-by-step explanation:

if Ruth is x, esmerelda is 5x,

four years ago,

Ruth is x+4,  esmerelda is 5x+4,  depend on the sum, we get:

x+4+5x+4=22, x=7/3

so:

Ruth is  x+4=7/3+4,   esmerelda  is  5x+4=35/3+4

7 0
4 years ago
Add 5y - 9 and 2 - 5y
levacccp [35]

Answer:

10y-11

Step-by-step explanation:

6 0
3 years ago
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3 0
3 years ago
What expression is equivalent to (2a - 7) + 5(3 - a)
Colt1911 [192]

Answer:

Step-by-step explanation:

2a-7+15-5a

2a-5a-7+15

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7 0
3 years ago
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