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strojnjashka [21]
3 years ago
7

How many true solutions are in x^2− 6x − 7 = 0

Mathematics
1 answer:
kumpel [21]3 years ago
8 0
There are 2 true solutions in x^2-6x-7=0
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For a parallel structure of identical​ components, the system can succeed if at least one of the components succeeds. Assume tha
Dennis_Churaev [7]

Using the probability concept, we have that:

a) It would not be unusual to observe one component​ fail, since the probability that one component​ fails is greater than 0.05.

b) It would be unusual to observe two components​ fail, since the probability that two components​ fail is less than 0.05.

<h3>What is a probability?</h3>

A probability is given by the <u>number of desired outcomes divided by the number of total outcomes</u>. If a probability is less than 0.05, the event is considered unusual.

In this problem, the probabilities are given as follows:

  • 0.21 probability that one component fails, hence not unusual.
  • (0.21)² = 0.0441 probability that two components fail, hence unusual.

More can be learned about probabilities at brainly.com/question/14398287

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5 0
2 years ago
Wilma is thinking of a number that is divisible by both 17 and 8. What is the
svet-max [94.6K]

Answer: The smallest possible number is 136.

Step-by-step explanation:

1. You need to find the Least common multiple (LCM), which is the smallest of the common multiples of 17 and 8.

2. You can descompose 17 and 8 into primes factors. Then, you obtain:

17=17

8=(2)(2)(2)=2^{3}

3. Now, you must choose commons and no commons with the greatest exponent and multiply them. Therefore the result is:

(17)(2^{3})=136

LCM=136


5 0
3 years ago
If it costs $3.50 per square foot, what is the approximate total cost of making this
Leni [432]

Answer:

the right answer would be C

7 0
3 years ago
Read 2 more answers
For each equation find a value for x that makes the equation true 10=3x-6
Gelneren [198K]

Answer:

5.3333

or 5 and 1/3

Step-by-step explanation:

10 = 3x - 6

add six

16 = 3x

divide by 3

5.3333 = x

I hope this helps!!

4 0
3 years ago
Alvin is 10 years older than Elga. The sum of their ages is 78. What is Elga's age?
musickatia [10]

Answer:

34

Step-by-step explanation:

A=10+E

10+E+E=78

10+2E=78

2E=78-10

2E=68, then divide by 2

E=34 while e is elga and a is alvin

5 0
3 years ago
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