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lyudmila [28]
2 years ago
15

Write a polynomial with roots r1 and r2 if 1. R1 + r2=4 2. R1 x r2=4

Mathematics
1 answer:
KiRa [710]2 years ago
6 0

Answer:

r²- 4r + 4

Step-by-step explanation:

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The current temperature is 48F. It is expected to drop 1.5F each hour. Determine how many hours the temperature will be 36 F.
Nina [5.8K]

Answer: 6 hours

Step-by-step explanation:

48/6 = 8

36/6 = 6

6 0
3 years ago
The ratio of the numerator to the denominator of a fraction is 2 to 3. If both the numerator and the denominator are increased b
masha68 [24]

Answer:

The fraction is \frac{4}{6}

Option (B) is correct.

3n-2d=0  and 4n+8=3d+6

Step-by-step explanation:

Let n denotes numerator and d denotes denominator of the fraction.

Given : The ratio of the numerator to the denominator of a fraction is 2 to 3.

That is \frac{n}{d}=\frac{2}{3}

Cross multiply , we get,

3n=2d

Or, 3n-2d=0   ........(1)

Also, given : . If both the numerator and the denominator are increased by 2, the fraction becomes 3/4

That is \frac{n+2}{d+2}=\frac{3}{4}

Cross multiply , We get,

4{n+2}={3}{d+2}

4n+8=3d+6  .........(2)

3d-4n=2  .......(3)

Thus, from (1) and (2) , option (B) follows.

Solving equation (1) and (3) to get the original fraction using elimination method,

3n - 2d = 0    ............(1)

and 3d - 4n = 2       .........(3)

Multiply equation (1) by 3 , we get ,

9n - 6d = 0  ..........(4)

Multiply equation (3) by 2 , we get ,

-8n + 6d = 4 ..........(5)

Adding (4) and  (5) , we get,

9n - 6d -8n + 6d = 4 + 0

⇒ n = 4

Put n = 4 in (1), we get

3n - 2d = 0 ⇒ 3(4) - 2d = 0 ⇒ 12 -2d = 0  ⇒  12 = 2d ⇒ d = 6

so, the numerator is 4 and  the denominator is 6.

Thus, the fraction is \frac{4}{6}


6 0
2 years ago
Find 4 × 0.001.<br><br> A) 0.0004 <br> B) 0.004 <br> C) 0.04 <br> D) 0.4
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Answer:

B) 0.004

Step-by-step explanation:

0.001

x      4

----------

0.004

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Answer:

Look up on youtbe

Step-by-step explanation:

It will give you A direct answer and you would actualy learn the subject

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Which one of these is a whole number?<br><br> a. 4/7<br> b.square root of 8<br> c.0<br> d.0.1
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The answer is C. 0

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