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3 years ago

How do you factor 14x-7=

Mathematics

1 answer:

Darya [45]3 years ago

8 0

My calculator said -98 :)

I hope I helped:)

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A fish tank initially contains 15 liters of pure water. Brine of constant, but unknown, concentration of salt is flowing in at 4

bulgar [2K]

Answer:

$\frac{dx}{dt}=4c-\frac{4}{15}x$

Step-by-step explanation:

Data provided in the question:

Initial volume of water = 15 liters

Concentration of salt = 4 liters per minute

x be the amount of salt, in grams, in the fish tank after t minutes have elapsed

The unknown concentration of incoming brine c.

Now,

Salt concentration per minute = $\frac{4}{15}$

For x amount of salt = $\frac{4}{15}x$

Therefore,

$\frac{dx}{dt}=4c-\frac{4}{15}x$

8 0

3 years ago

May someone please help me with this?

muminat

I think similarity and congruence and reflection..

..I would need another persons opinion

6 0

4 years ago

Read 2 more answers

12 + 9/3 exponent 2 What is the answer?

ira [324]

9/3 = 3
3 exponent 3 = 27.

27 + 12 = 39

3 0

3 years ago

Read 2 more answers

A farmer had twice as many chickens as ducks on his farm. After he sold 166 chickens and ducks, he had half as many chickens as

mamaluj [8]

Answer:

The farmer have at first 202 chickens.

Step-by-step explanation:

Given:

A farmer had twice as many chickens as ducks on his farm. After he sold 166 chickens and ducks, he had half as many chickens as ducks left.

Now, to find the chickens farmer have at first.

Let the chickens be $x.$

And, the ducks be $y.$

As, the farmer had twice as many chickens as ducks on his farm.

So, $x=2y$ ......(1)

As, given the farmer after selling 166 chickens and ducks, he had half as many chickens as ducks left.

According to question:

$x-166=(y-29)\times \frac{1}{2}$

$x-166=\frac{y-29}{2}$

Substituting the value of $x$ from equation (1) we get:

$2y-166=\frac{y-29}{2}$

By cross multiplying we get:

$4y-332=y-29$

Adding both sides 332 we get:

$4y=y+303$

Subtracting both sides by $y$ we get:

$3y=303$

Dividing both sides by 3 we get:

$y=101.$

Now, to get the number of chickens substituting the value of $y$ in equation (1):

$x=2y\\\\x=2\times 101\\\\x=202.$

Therefore, the farmer have at first 202 chickens.

7 0

3 years ago

You are dealt two cards without replacement what is the probability the first card is one of 4 twos and second is 4 tens in a de

Ilia_Sergeevich [38]

A = drawing a two card
B = drawing a ten card

P(A) = 4/52 = 1/13
P(B|A) = P(A and B)/P(A)
P(A)*P(B|A) = P(A and B)
P(A and B) = P(A)*P(B|A)
P(A and B) = (1/13)*(4/51)
P(A and B) = 4/663
P(A and B) = 0.006033

The answer as a fraction is exactly 4/663
The answer in decimal form is approximately 0.006033

8 0

3 years ago