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nekit [7.7K]
4 years ago
12

How to do quadratics

Mathematics
1 answer:
larisa [96]4 years ago
6 0
First, put your polynomial in standard form(ax²+bx+c=0). Then plug the a,b and c for x=(-b+-√b²-4ac)÷2a. As a result, you can either get one, two or no real answers.
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ATM personal identification number (PIN) codes typically consist of four-digit sequences of numbers. Find the probability that i
oksian1 [2.3K]

Answer:

(a) 0.0001 or 0.01%

(b) 0.01 or 1%

Step-by-step explanation:

Since there are 10 possible numeric digits (from 0 to 9), and there is only one correct digit, there is a 1 in 10 change of getting each digit right.

The probability that if you forget your PIN, then you can guess the correct sequence

(a) at random:

P=(\frac{1}{10})^4=0.0001=0.01\%

(b) when you recall the first two digits.

P=(\frac{1}{10})^2=0.01=1\%

7 0
3 years ago
The two Step equations 5k=20
victus00 [196]

Answer: X = 4

Step-by-step explanation: To solve for k in this equation, we want to get k by itself on the left side of the equation.

Since k is being multiplied by 5, to get k by itself, we need to divide by 5 on the left side of the equation. Since we divided by 5 on the left side, we must also divide by 5 on the right side.

On the left side, notice that the 5's cancel out, so we are simply left with z. On the right side, we have 20 divided by 5 which gives us 4.

Now we have X = 4.

Finally, remember to check your answer by substituting a 4 back into the original equation.

So we have 5 (4) = 20 which is a true statement.

This means that our answer, x = 4 is correct.

5 0
3 years ago
3/5, 1/2,5/7 as a common
miskamm [114]

a common what? denominator?


4 0
3 years ago
Fred and Sam are a team in the local 138.2 miles bike run aton . Fred will compete in the bike race and Sam will compete in the
astraxan [27]
HSSHSHHDHDHDHDHFHEKSJDJD OKAY THEY ANSWER IS A I HAVE TO USE 20 letters lol
3 0
3 years ago
Simplify 4/6+x/3+3/2
Ronch [10]
4/6=2/3
2/3+x/3+3/2
apply rule a/c+-b/c=(a+-b)/c
(2+x)/3+3/2 is your final answer
remove the parenthesis if you want i was just trying to show 2+x over 3

4 0
3 years ago
Read 2 more answers
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