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4 years ago

Using negative numbers solve the equation. -4 + -5 + 2=

Mathematics

2 answers:

Kay [80]4 years ago

7 0

The answer is -7 (why does this app want me to write 20 characters)

horrorfan [7]4 years ago

3 0

<h2>Answer:</h2>

<u>The answer is</u><u> -7</u>

<h2>Step-by-step explanation:</h2>

Taking the equation

= −4 + (−5) + 2

Negative and positive will multiply to give us a negative

= −4 −5 + 2

= −9+2

=−7

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10 normal six sided dice are thrown.Find the probability of obtaining at least 8 failuresif a success is 5 or 6.

erastova [34]

Answer:

0.2992 = 29.92% probability of obtaining at least 8 failures.

Step-by-step explanation:

For each dice, there are only two possible outcomes. Either a failure is obtained, or a success is obtained. Trials are independent, which means that the binomial probability distribution is used to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

A success is 5 or 6.

A dice has 6 sides, numbered 1 to 6. Since a success is 5 or 6, the other 4 numbers are failures, and the probability of failure is:

$p = \frac{4}{6} = 0.6667$

10 normal six sided dice are thrown.

This means that $n = 10$

Find the probability of obtaining at least 8 failures.

This is:

$P(X \geq 8) = P(X = 8) + P(X = 9) + P(X = 10)$

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 8) = C_{10,8}.(0.6667)^{8}.(0.3333)^{2} = 0.1951$

$P(X = 9) = C_{10,9}.(0.6667)^{9}.(0.3333)^{1} = 0.0867$

$P(X = 10) = C_{10,10}.(0.6667)^{10}.(0.3333)^{0} = 0.0174$

Then

$P(X \geq 8) = P(X = 8) + P(X = 9) + P(X = 10) = 0.1951 + 0.0867 + 0.0174 = 0.2992$

0.2992 = 29.92% probability of obtaining at least 8 failures.

8 0

3 years ago

3m − 9n = 24; n = −1, 1, 3

Bogdan [553]

m=24=+(-9,1,3

Step-by-step explanation:

Substitute n=3,\pm 1n=3,±1 into 3m-9n=243m−9n=24

Solve for mm in 3m-(-9,1,3)=243m−(−9,1,3)=24

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3 years ago

How many ways are there to choose eight coins from a piggy bank containing 100 identical pennies and 80 identical nickels?

Ahat [919]

I think it's two but I'm not sure don't count on it.

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3 years ago

What is 3/8 divided by 5/12

Marat540 [252]

Answer:

it would be 9/10.

Step-by-step explanation:

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4 years ago

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