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Jet001 [13]
3 years ago
7

5(x – 4) + 3x – 9x = 6 - (2x + 5) + 8x

Mathematics
1 answer:
AURORKA [14]3 years ago
6 0
This is what i got:
-x-20=6x+1
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a) Suppose that a large mixing tank initially holds 300 gallons of water in which 50 pounds ofsalt have been dissolved. Pure wat
Kay [80]

Answer:

x  =  50*e∧ -t/100

Step-by-step explanation:

We assume:

1.-That the volume of mixing is always constant 300 gallons

2.-The mixing is instantaneous

Δ(x)t   =  Amount in  - Amount out

Amount  =  rate * concentration*Δt

Amount in  =  3 gallons/ min * 0  =  0

Amount out  = 3 gallons/min *  x/ 300*Δt

Then

Δ(x)t/Δt  =  - 3*x/300    Δt⇒0   lim Δ(x)t/Δt  =  dx/dt

dx/dt  =  - x/100

dx/ x  =  - dt/100

A linear first degree differential equation

∫ dx/x   =  ∫ - dt/100

Ln x  =  - t/100  +  C

initial conditions to determine C

t= 0     x =  50 pounds

Ln (50) = 0/100 * C

C =  ln (50)

Then final solution is:

Ln x  =  - t/100  + Ln(50)   or

e∧ Lnx   =  e ∧ ( -t/100 + Ln(50))

x  =  e∧ ( -t/100) * e∧Ln(50)

x  = e∧ ( -t/100) * 50

x  =  50*e∧ -t/100

4 0
2 years ago
What would the answer be ?
Mashutka [201]

Answer: 7

Step-by-step explanation: there are 4 full circles so that equals 4. 1+1=2, 1/8+7/8=1. 4+2+1=7

6 0
2 years ago
Read 2 more answers
What is the GCF of the expression 4x2 + 3x?
DochEvi [55]

The answer is A: x

.............

5 0
3 years ago
Read 2 more answers
What is 85+ 65x- 6 will brainliest to who ever answer it first
IgorC [24]

Step-by-step explanation:

hope this image will help u

I have solved this myself

8 0
2 years ago
Charlie bought 2 pounds of pears for $0.76 per pound and 2 pounds of grapes for $1.40 per pound. How much
Vedmedyk [2.9K]
0.76 x 2 = 1.52
1.40 x 2 = 2.80
1.52 + 2.80= 4.32

Answer is 4 dollars and 32 cents
5 0
2 years ago
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