A tank contains 1000L of pure water. Brine that contains 0.02kg of salt per liter enters the tank at a rate of 5L/min. Also, brine that contains 0.07kg of salt per liter enters the tank at a rate of 10L/min. The solution is kept thoroughly mixed and drains from the tank at a rate of 15L/min. Answer the following questions.

a. How much salt is in the tank after t minutes?
b. How much salt is in the tank after 4 hours?

Answer:

if there is a pic i need to to help so since there is no pic i can not help

Step-by-step explanation:

Answer:

2x² + 3x/2 - 9

Step-by-step explanation:

(f+g)(x) = f(x) + g(x)

= x/2 - 3 + 2x² + x - 6

= 2x² + x/2 + x -3 -6

= 2x² + 3x/2 - 9

Answer:

3/4

Step-by-step explanation:

2- 1 1/4= 3/4

Answer:

3/4

Step-by-step explanation:

Answer:

3

4

0

2

Step-by-step explanation:

3

4

0

2

Answer:

V=47

Step-by-step explanation:

12+5x7

12+35

47

Answer:

Final velocity (v) = 47 m/s

Step-by-step explanation:

u = 12

a = 5

t = 7

v = ?

v = u + at (first law of motion)

v = 12 + (5 × 7)

v = 12 + 35

v = 47 m/s.

Answer:

it is an iscoceles triangle..

so I think it should be 45 and 45

Hi!

So, first, let's just form the equation:

We know that all the side lengths equal 12 cm.

So the equation will be:

5 + 3 + x = 12

The answer you put in the box is:

5 + 3 + x

To find the value of x, we just solve this equation:

5 + 3 + x = 12

Combine like terms:

8 + x = 12

Same to both sides:

x = 12 - 8

x = 4

I hope this helped, let me know if you have any questions.

Answer:

and.....? look im only answering for the points m'lady. all i know is that olivia has, alex has, and liam HAD.

Step-by-step explanation:

Answer:

Step-by-step explanation:

63 = 3 * 3 * 7

49 = 7 * 7

77 = 7 * 11

So the GCF = 7.

LCM = 7 * 7 * 3 * 3 * 11 = 4851.

Answer:

Parallelogram

Step-by-step explanation:

That dude above doesn't know what his talking about its parallelogram my teacher confirmed it too

The quadrilateral MNOP is a parallelogram in which opposite sides are equal and parallel to each other.

A quadrilateral is a polygon with four angles and four sides.

Given the vertices of quadrilateral MNOP at M(1, 1) N(3, 4) O(6, 6) P(4, 3). Plotting the points using geogebra,

We can see that the quadrilateral MNOP is a parallelogram in which opposite sides are equal and parallel to each other.

Find out more on Quadrilateral at: https://brainly.com/question/23935806

Answer:

2

Step-by-step explanation:

3(5y+3) = 39

15y+9 = 39

15y=30

y=2

Step-by-step explanation:

15=3

35=x

15x=3×35

x= 3×35÷15

x=105÷15

x=7

Answer: 330 miles

Step-by-step explanation:

The distance provided for the question is:

Wrexham

18 Ruthin

21 12 Cornwen

15 33 23 Oswestry

What this means is that Ruthin and Oswestry are 33 miles apart.

Each day, Jane travels back and forth for a total of:

= 33 * 2

= 66 miles

In 5 days she would have travelled:

= 5 * 66

= 330 miles

Answer:

No

Step-by-step explanation:

2x-3y= 6xy

Answer:

a=1

b= -6

c=48

Step-by-step explanation:

x^2=6(x-8)

x^2=6x-48

x^2-6x+48

a,b are the coefficients of x^2 and x

c is the constant value present

Therefore it is basically written as ax^2+bx+c

and comparing with the answer x^2-6x+48,

a=1, b= -6, c=48

Answer:

I think there is no solution to this problem

Step-by-step explanation:

Answer:

c because 3x3 is 9 and 3 plus 9 is 12

Step-by-step explanation:

Answer:

x>10,x<−5

Step-by-step explanation:

[tex]x > - 5[/tex] or [tex]x < 10[/tex] are the two possible solutions to the given  inequality.

An absolute value function is a function that contains an algebraic expression within absolute value symbols.

A statement of an order relationship—greater than, greater than or equal to, less than, or less than or equal to—between two numbers or algebraic expressions.

According to the given question.

We have an inequality |3x| > x + 20

Solve the above given inequality |3x| > x + 20

⇒ [tex]-(x + 20) < 3x < +( x + 20)[/tex]

⇒ [tex]-x -20 < 3x < x + 20[/tex]

⇒ [tex]3x > -x -20[/tex] or [tex]3x < x + 20[/tex]

⇒ [tex]3x+x > -20[/tex] or [tex]3x - x < 20[/tex]

⇒ [tex]4x > -20[/tex] or [tex]2x < 20[/tex]

⇒[tex]x > -5[/tex] or [tex]x < 10[/tex]

⇒ x ∈ (-∞, -5)∪(10,∞)

Hence, [tex]x > - 5[/tex] or [tex]x < 10[/tex] are the two possible solutions to the given  inequality.

Find out more information about absolute value inequalities here:

https://brainly.com/question/27517767

#SPJ2

Answer:

(B) square

Step-by-step explanation:

Square (regular quadrilateral): all four sides are of equal length (equilateral), and all four angles are right angles.

Answer:

B) square is your answer.

Step-by-step explanation:

hope it's help you with write answers.

Answer:

$96

Step-by-step explanation:

Answer:

The final price after deducting the percent of discount would be $24.

Answer: About 3,811 US dollars.

Step-by-step explanation:

Divide 25,000 with 6.56. That equals about 3,811 US dollars.

hope this helps :)

Answer:

The least common denominator for those three numbers would be 5.

Step-by-step explanation:

5x4=20

5x5=25

5x6=30

Answer:

4x + 5y = 20

Step-by-step explanation:

It is parallel to y = -4/5x + 6

Answer:

f = 81.5

Step-by-step explanation:

hello!

to be able to find the score she needs to have a final grade of at least 80, we use the following equation:

[tex]\frac{72+90+75+2f}{5}=80[/tex]

To get rid of the denominator, we multiply both sides of the equation by 5. Once we do, 5 gets canceled and 80 * 5 = 400. Therefore:

237 + 2f = 400.

Transpose, then simplify.

2f = 400 - 237

2f = 163

Divide both sides by 2 to isolate f:

f = 81.5

Answer:

1  17/24

Step-by-step explanation:

Answer:

41/24 or 1 17/24

Step-by-step explanation:

Answer:

One of the properties of parallelograms is that opposite sides are congruent.  

Step-by-step explanation:

Answer:

x is equal to 1 and y is equal to 2

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Work Shown:

x = brother's age, which is some positive whole number

x-6 = sister's age, since she is 6 years younger than her brother

The product is the result of multiplication, so we multiply x and (x-6) to get 135

x*(x-6) = 135

x^2-6x = 135

x^2-6x-135 = 0

Use the quadratic formula to solve from here

We plug in a = 1, b = -6, c = -135

[tex]x = \frac{-b\pm\sqrt{b^2-4ac}}{2a}\\\\x = \frac{-(-6)\pm\sqrt{(-6)^2-4(1)(-135)}}{2(1)}\\\\x = \frac{6\pm\sqrt{576}}{2}\\\\x = \frac{6\pm24}{2}\\\\x = \frac{6+24}{2}\ \text{ or } \ x = \frac{6-24}{2}\\\\x = \frac{30}{2}\ \text{ or } \ x = \frac{-18}{2}\\\\x = 15\ \text{ or } \ x = -9\\\\[/tex]

x represents the brother's age, in years. So x must be positive.

Since x must be positive, this means we rule out x = -9

The value x = 15 is the only practical solution.

If x = 15, then x-6 = 15-6 = 9

The brother is 15 years old and the sister is 9 years old.

The product of their ages is 15*9 = 135, which confirms the answers.

Answer:

D

Step-by-step explanation:

Answer:

X=65.4 Degrees

Step-by-step explanation:

Hehe ;)

Answer:

n=20

Step-by-step explanation:

1/2n+6=16

1/2n=16-6

1/2n=10

n=10x2

n=20