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jarptica [38.1K]
2 years ago
12

Solve using the quadratic formula. Round answers to the nearest hundredth. 6x^2-14x-9=0

Mathematics
1 answer:
miv72 [106K]2 years ago
7 0

Answer:

use the quadratic formula

Step-by-step explanation:

from the equation a=6 b=-14 c=-9

from the quadratic formula

x = ( - b  {+ or - }   \sqrt{ {b}^{2}  + 4ac} ) \div 2a

therefore insert in the values of a, b and c

x = ( - ( - 14) + or -  \sqrt{ {(  - 14)}^{2}  + 4 \times 6 \times ( - 9)} ) \div 2 \times 6

x=2.858148594

X=-0.52481526

after inserting

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inessss [21]

Answer:

The probability that at most 38 of the 60 relays are from supplier A is P(X≤38)=0.3409.

Step-by-step explanation:

We can model this question with a binomial distribution random variable.

The sample size is n=60.

The probability that the relay come from supplier A is p=2/3 for any relay.

If we use a normal aproximation, we have the mean and standard deviation:

\mu=np=60*(2/3)=40\\\\\sigma=\sqrt{npq}=\sqrt{60*(2/3)*(1/3)} =3.65

The probability that at most 38 of the 60 relays are from supplier A is P(X≤38)=0.3409:

P(X\leq38)=P(X

5 0
3 years ago
Answer the question below
butalik [34]

Answer:

x=-1

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Step-by-step explanation:

(7x+y)-(x+y)=-6

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2 years ago
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Attached the solution with work shown.

6 0
3 years ago
How many times does 3 fit into 87?
Mars2501 [29]

Answer:

29 times

Step-by-step explanation:

We can find this answer by dividing 87 by 3

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Answer:

4

Step-by-step explanation:

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