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e-lub [12.9K]
3 years ago
14

How do you solve 10x^2 + x - 2 = 0

Mathematics
1 answer:
Zielflug [23.3K]3 years ago
7 0
This is what I got If it helps

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I need work shown please
Mkey [24]
See the attached picture showing the work:

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3 years ago
stack of mail consists of 8 bills, 10 letters, and 6 advertisements. One piece of mail is drawn at random and put aside. Then a
kozerog [31]

INFORMATION:

We know that:

- stack of mail consists of 8 bills, 10 letters, and 6 advertisements.

- One piece of mail is drawn at random and put aside. Then a second piece of mail is drawn.

And we must find P (both are letters)

STEP BY STEP EXPLANATION:

To find the probability, we need to know that we have two events. First, when one piece of mail is drawn at random and put aside and, second, when a second piece of mail is drawn.

These two events are dependent. If A and B are dependent events, P(A and B) = P(A) • P(B after A) where P(B after A) is the probability that B occurs after A has occurred.

So, first

- Probability of A (the first piece is letter)

P(A)=\frac{favorable\text{ }cases}{total\text{ cases}}=\frac{10}{24}

- Probability of B after A

Since A already occurred and one piece of the mail was drawn (a letter), now in total we would have 9 letter and 23 total pieces

P(B\text{ after }A)=\frac{9}{23}

Finally, replacing in the initial formula

P(A\text{ and }B)=\frac{10}{24}\cdot\frac{9}{23}=\frac{90}{552}=0.1630

Finally, the probability would be 0.1630

ANSWER:

P (both are letters) = 0.1630

8 0
1 year ago
Choose the correct simplification of the expression (3x)4.
Sonbull [250]

Answer:

81x4

~Hope this answers your question!~

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Please help me with all of them
kaheart [24]

Answer:

Question 6 is 1/6

Question 5 is 5/9

Question 7 is 1/15

Question 8 is 3/20

Question 4 is 1/30

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3 years ago
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Is -33 irrational or rational?
vladimir2022 [97]

-33 is a rational number. It is an integer with a definitive stopping point (by this I mean it is not a decimal number with endless repeating digits).

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3 years ago
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