Ask question

Ask question

All categories

stepladder [879]

3 years ago

6

-7x= -56 Is the answer A or B

1 answer:

FromTheMoon [43]3 years ago

6 0

Your answer choices are cut off. It appears that choice B isn't shown. However, if

-7x = -56

then

x = 8

the result is positive due to the fact that dividing two negatives (-56 over -7) leads to a positive result. As a check, replace x with 8 to get...

-7x = -56
-7*x = -56
-7*8 = -56
-56 = -56

the fact that we get the same value on both sides confirms we have the right answer.

You might be interested in

If n is at least 6, which inequality best represents the values of n? (1 point) n ≥ 6 n > 6 n < 6 n ≤ 6

spin [16.1K]

At least means that the number could either equal 6 or be greater than 6.

The inequality would be: n ≥ 6

3 0

3 years ago

Naval intelligence reports that 99 enemy vessels in a fleet of 1818 are carrying nuclear weapons. If 99 vessels are randomly tar

oee [108]

Answer:

0.001687 = 0.1687% probability that no more than 1 vessel transporting nuclear weapons was destroyed.

Step-by-step explanation:

The vessels are destroyed and then not replaced, which means that the hypergeometric distribution is used to solve this question.

Hypergeometric distribution:

The probability of x successes is given by the following formula:

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}$

In which:

x is the number of successes.

N is the size of the population.

n is the size of the sample.

k is the total number of desired outcomes.

Combinations formula:

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

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

In this question:

Fleet of 18 means that $N = 18$

9 are carrying nuclear weapons, which means that $k = 9$

9 are destroyed, which means that $n = 9$

What is the probability that no more than 1 vessel transporting nuclear weapons was destroyed?

This is:

$P(X \leq 1) = P(X = 0) + P(X = 1)$

In which

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}$

$P(X = 0) = h(0,18,9,9) = \frac{C_{9,0}*C_{9,9}}{C_{18,9}} = 0.000021$

$P(X = 1) = h(1,18,9,9) = \frac{C_{9,1}*C_{9,8}}{C_{18,9}} = 0.001666$

Then

$P(X \leq 1) = P(X = 0) + P(X = 1) = 0.000021 + 0.001666 = 0.001687$

0.001687 = 0.1687% probability that no more than 1 vessel transporting nuclear weapons was destroyed.

4 0

3 years ago

Any help, please! <br> I dont understand

frutty [35]

The answer would be 40% :)

3 0

3 years ago

Solve –2x2 +3x – 9 = 0. (solving quadratic equation with complex numbers)..

goldfiish [28.3K]

-3+-sqrt9-56/-4
-3+-sqrt-47/-4
-3+-sqrt47i/-4

4 0

3 years ago

The purchase price of an iPad is $625.00. There is a 15% discount and the tax rate is

vagabundo [1.1K]

Answer:

$573.75

Step-by-step explanation:

625.00x15%=93.75

625.00-93.75=531.25

531.25x8%=42.50

531.25+42.50=573.75

5 0

3 years ago

Read 2 more answers