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morpeh [17]
3 years ago
10

Complete the square of X² +8x+15=0

Mathematics
1 answer:
Elenna [48]3 years ago
8 0

Answer: (x+4)^2 -1

Step-by-step explanation:

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Identifying equivalent statements and negations of a conditional statement: help
Vitek1552 [10]

Answer:

1: Equal

2: Negation

3: Negation

4: Neither

Step-by-step explanation:

Sorry if I got any of them wrong

6 0
3 years ago
The screening process for detecting a rare disease is not perfect. Researchers have developed a blood test that is considered fa
lesya692 [45]

Answer:

Type I: 1.9%, Type II: 1.6%

Step-by-step explanation:

given null hypothesis

H0=the individual has not taken steroids.

type 1 error-falsely rejecting the null hypothesis

⇒   actually the null hypothesis is true⇒the individual has not taken steroids.

 but we rejected it ⇒our prediction is the individual has taken steroids.

typr II error- not rejecting null hypothesis when it has to be rejected

⇒actually null hypothesis is false ⇒the individual has taken steroids.

but we didnt reject⇒the individual has not taken steroids.

let us denote

the individual has taken steroids by 1

the individual has not  taken steroids.by 0

                            predicted

                              1       0

   actual          1    98.4%  1.6%

                        0   1.9%   98.1%

so for type 1 error  

 actual-0

predicted-1

therefore from above table we can see that probability of Type I error is 1.9%=0.019

so for type II error

   actual-1

predicted-0

therefore from above table we can see that probability of Type I error is 1.6%=0.016

5 0
3 years ago
Please help ASAP
makkiz [27]

Answer:

Option A.

Step-by-step explanation:

According to this survey results :

Students : 80 like viking and 20 like patriot.

Teachers : 5 like viking and 15 like patriot.

In Option B it is given that patriot is more popular in students while viking is more popular in teachers which is not correct.

In option c patriot is equally popular in students and teachers, which is also not correct. because patriot is popular in 20% of students but 80% in teachers, which is not correct.

In option d there is no difference between students and teachers, this statement is also not correct because there is lots of differences in their choices.

In Option A it is said that viking is more popular in students but patriot is more popular in teachers. this is correct.

5 0
3 years ago
Read 2 more answers
A wombat can reach a top speed of 40km/hr. What is this speed in m/s?
Lena [83]

Answer:

<u>11,1</u> <u>m/s</u>

Step-by-step explanation:

40km/hr equals 11,1111111 m/s

11,1111111 simplified: <u>11,1</u>

= <u>11,1</u> <u>m/s</u>

5 0
1 year ago
Is it true or false that the functions below are inverse functions and why. I picked false but I’m not sure
yawa3891 [41]

it got tagged.........................

3 0
3 years ago
Read 2 more answers
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