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Lelu [443]
4 years ago
6

If (2, 3) ∈ {2, 5} X {X, 6} then X =​

Mathematics
1 answer:
Genrish500 [490]4 years ago
4 0

Answer:

X=2

Step-by-step explanation:

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During a flu epidemic, 35% of the school's students have the flu. Of those with the flu, 90% have high
frutty [35]

Answer: 0.8015

Step-by-step explanation:

Let F= event that a person has flu

H= event that person has a high temperature.

As per given,

P(F) =0.35

Then P(F')= 1- 0.35= 0.65               [Total probability= 1]

P(H | F) = 0.90

P(H|F') = 0.12

By Bayes theorem, we have

P(F|H)=\dfrac{P(F)\timesP(H|F)}{P(F)\timesP(H|F)+P(F')\timesP(H|F')}\\\\=\dfrac{0.35\times0.90}{0.35\times0.90+0.65\times0.12}\\\\=\dfrac{0.315}{0.315+0.078}\approx0.8015

Required probability = 0.8015

8 0
3 years ago
What is the range of y=−x^2−2x+3?<br><br> x≤−4<br><br> x≤4<br><br> x≥−4<br><br> x≥4
saveliy_v [14]

Answer:

Domain: (−∞,∞),{x|x∈R}

Range: (−∞,4],{y|y≤4

Hope this helps

4 0
4 years ago
An airplane flying at an altitude of 32,000 feet descends at a rate of 1,300 feet per minute
Rashid [163]
Not sure if there is a question here. However, I'll assume you're looking for when it lands. It takes about 24.6 minutes to land. 
7 0
4 years ago
Find all numbers whose absolute value is 8.
Zepler [3.9K]

Answer:

<h2>8 or -8</h2>

Step-by-step explanation:

The absolute value of number a:

|a| = a for a ≥ 0

|a| = -a for a < 0

|a| = 8 ⇔ a = 8 or a = -8

7 0
3 years ago
How many solutions does the following equation have?<br> 35+ 4) = 3y + 123
kotegsom [21]

Answer:

y= -28

Step-by-step explanation:

35+4=3y+123

39=3y+123

-3y+39=123

-3y=123-39

-3y=84

y= -28

4 0
3 years ago
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