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frutty [35]
4 years ago
10

Help!

Mathematics
1 answer:
eduard4 years ago
3 0
-sqrt 1 = -1 this is an integer so it is rational
3sqrt(2); sqrt2 is not a perfect square so it is irrational
square root 15 is not a perfect square so it is irrational
- 5 5/6 is a rational number because it can be written in the form of a fraction with integer numerator and denominators -35/6.

pi^2 is irrational, pi is always irrational, it in non-terminating decimal
2sqrt 9 = 2 * 3 = 6 this is rational because 9 is a perfect square

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20) If a quadratic equation cannot be factored then
PolarNik [594]

Answer:

?

Step-by-step explanation:

I'm confused, what are you asking?

7 0
4 years ago
Investigators conducting a study regarding the effects of water pollution and peptic ulcer disease obtained the following data:
natima [27]

Answer:

Kindly check explanation

Step-by-step explanation:

The prevalence per 1000 among the exposed :

Total number of diseases among those exposed = 60 + 238 = 298

Prevalence per 1000 among the exposed :

(298 / 9000) * 1000 = 33.11

Prevalence per 1000 among the non exposed :

((90 - 60) + (268 - 238)) / 3000

(60 / 3000) * 1000 = 20

Incidence rate per 1000 among the exposed :

238 / 5940 * 1000

0.0400673 * 1000 = 40.07

Incidence rate per 1000 among the unexposed :

((90 - 30) / (3000-30)) * 1000

(60/2970) * 1000 = 20.2

7 0
3 years ago
Which property would allow you to use mental computation to simplify the problem 23 + (7 + 9)?
katrin2010 [14]
Distributive property
3 0
3 years ago
Multiply.
Helen [10]
Okay. When it comes to multiplying decimals, you multiply them just like you would do whole numbers. However, solving them by paper, you would add a decimal point into the answer, depending on how many numbers are behind the decimal point in the numbers being multiplied. In this case, the decimal point will go in front of two numbers, because there are two numbers behind the decimal point in -1.2 and 0.4. Know that the answer will be negative, because there is one negative and one positive number.
Multiply both numbers. -1.2 * 0.4 is -0.48. There. The product is -0.48.
6 0
4 years ago
Complete the proof of the exterior angle theorem. Given: ∠4 is an exterior angle of △ABC. Prove: m∠1+m∠2=m∠4 Answer: Statement R
Nataly_w [17]

Answer:


Step-by-step explanation:

Statement                                                                              Reason

1. ∠4 is an exterior angle of ΔABC                                         Given

2. ∠3 and ∠4 form a linear pair                                    Linear pair property

3. ∠3 is supplementary to ∠4                                     Straight line property

4. m∠3+m∠4=180°                                                ∠3 is supplementary to ∠4      

5. m∠1+m∠2+m∠3=180°                                           Triangle sum theorem

6.m∠1+m∠2+m∠3= m∠3+m∠4                                   Statement 4 and 5

7. m∠1+m∠2=m∠4                                                     Subtraction property

5 0
3 years ago
Read 2 more answers
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