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3 years ago

11

a fish tank holds 513 gallons but leaks at a rate of 4 gallons per day and 684 gallons but leak at a rate of 7 gallons per day .

after how many days will the amount of water in the two tanks be the same

2 answers:

DIA [1.3K]3 years ago

7 0

Answer:

35 days because 7 x 5 = 35

Hope it helped :u

Irina-Kira [14]3 years ago

3 0

35 days 7 times 5 is 35 so it should line up

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on monday,the price of one share of webb company stock was 24.85. by friday,the price was 25.004. by how much did the price chan

vredina [299]

Answer:

idk

Step-by-step explanation:

how about you do the math yourself

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3 years ago

A die is rolled. The set of equally likely outcomes is {1, 2, 3, 4, 5, 6}. Find the probability of getting a 9.

mrs_skeptik [129]

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you are only rolling 1 dice the probability of getting 9 is 0 there are only 6 sides to one die

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2 years ago

What is [2times6]-7+92+45<br> divided by 5

Vesna [10]

$\frac{(2 \times 6) - 7 + 92 + 45 }{5} = \frac{12 - 7 + 92 + 45}{4} = \frac{142}{5} = 28.4$

Hope that helps :)

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3 years ago

In a population distribution, a score of x=57 corresponds to z=-0.25 and a score of x=87 corresponds to z=1.25. Find the mean an

Serggg [28]

Here is dependence between scores and x-values:

$Z_i=\dfrac{X_i-\mu}{\sigma},$

where $\mu$ is the mean, $\sigma$ is standard deviation and i changes from 1 to 2.

1. When i=1, $Z_1=-0.25,\ X_1=57,$ then

$-0.25=\dfrac{57-\mu}{\sigma}.$

2. When i=2, $Z_2=1.25,\ X_2=87,$ then

$1.25=\dfrac{87-\mu}{\sigma}.$

Now solve the system of equations:

$\left\{\begin{array}{l}-0.25=\dfrac{57-\mu}{\sigma}\\ \\1.25=\dfrac{87-\mu}{\sigma}.\end{array}\right.$

$\left\{\begin{array}{l}-0.25\sigma=57-\mu\\ \\1.25\sigma=87-\mu.\end{array}\right.$

Subtract first equation from the second:

$1.25\sigma-(-0.25\sigma)=87-57,\\ \\1.5\sigma=30,\\ \\\sigma=20.$

Then

$1.25=\dfrac{87-\mu}{20},\\ \\87-\mu=25,\\ \\\mu=87-25=62.$

Answer: the mean is 62, the standard deviation is 20.

3 0

3 years ago

Read 2 more answers

Create a list of steps, in order, that will solve the following equation.

AleksandrR [38]

Step-by-step explanation:

Add 1 to both sides

Multiply both sides by 4

Take the square root of both sides

Subtract 5 from both sides

(straight from khan academy hints)

8 0

3 years ago