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Zanzabum
3 years ago
10

-5X +1 92 - 321+13 - 12X

Mathematics
1 answer:
Bogdan [553]3 years ago
8 0

Answer:

Step-by-step explanation:

There’s no equal sign.

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Lol hey its me and i got my account deleted again
kenny6666 [7]

Answer:

hey Jazzi, how you been???!!!

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
A tank contains 3,000 L of brine with 15 kg of dissolved salt. Pure water enters the tank at a rate of 30 L/min. The solution is
Shalnov [3]

Answer:

Step-by-step explanation:

Volume of tank is 3000L.

Mass of salt is 15kg

Input rate of water is 30L/min

dV/dt=30L/min

Let y(t) be the amount of salt at any time

Then,

dy/dt = input rate - output rate.

The input rate is zero since only water is added and not salt solution

Now, output rate.

Concentrate on of the salt in the tank at any time (t) is given as

Since it holds initially holds 3000L of brine then the mass to volume rate is y(t)/3000

dy/dt= dV/dt × dM/dV

dy/dt=30×y/3000

dy/dt=y/100

Applying variable separation to solve the ODE

1/y dy=0.01dt

Integrate both side

∫ 1/y dy = ∫ 0.01dt

In(y)= 0.01t + A, .A is constant

Take exponential of both side

y=exp(0.01t+A)

y=exp(0.01t)exp(A)

exp(A) is another constant let say C

y(t)=Cexp(0.01t)

The initial condition given

At t=0 y=15kg

15=Cexp(0)

Therefore, C=15

Then, the solution becomes

y(t) = 15exp(0.01t)

At any time that is the mass.

5 0
3 years ago
8/9 to what power equals 64/81
Ierofanga [76]

2nd

Step-by-step explanation:

8/9 to the second power equals to 64/81. Hope this helps!

7 0
3 years ago
Read 2 more answers
What would cause an Inequality sign in an equation to flip?
FrozenT [24]

Answer:

When dividing both sides by a negative.

Step-by-step explanation:

When dividing OR multiplying both sides by a negative, we need to flip the inequality signs.

6 0
2 years ago
Write the name of the period that has the digits 913
salantis [7]
Nine hundred thirteenths if this is a decimal
3 0
3 years ago
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