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2 years ago

Does anyone know what 3m−7=5 is?

Mathematics

2 answers:

Maksim231197 [3]2 years ago

7 0

Answer: m=4

Step-by-step explanation:

3m−7=5

3m = 12

m= 4

Andrews [41]2 years ago

7 0

Answer:

m = 4

Step-by-step explanation:

add 7 to both sides > 3m - 7 + 7 = 5 + 7
simplify > 3m = 12
divide coefficient > 3m / 3 = m & 12 / 3 = 4

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Travka [436]

Answer:

(6 / 4) * (7 + 9)

Step-by-step explanation:

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4 0

2 years ago

Chef Alfredo invested $4800 at a simple interest rate of 5% and can now afford a $6,000

KonstantinChe [14]

Answer:

5 years

Step-by-step explanation:

<u>The difference in the amounts is the total interest:</u>

6000 - 4800 = 1200

<u>Yearly interest is:</u>

4800*0.05 = 240

<u>Time in years:</u>

1200/240 = 5

7 0

3 years ago

A tank contains 250 liters of fluid in which 40 grams of salt is dissolved. Brine containing 1 gram of salt per liter is then pu

VashaNatasha [74]

Answer:

$A(t)=250-210e^{-\frac{t}{50}}$

Step-by-step explanation:

We are given that

Volume,V=250 L

Mass of salt=m=40 g

Brine containing 1 g per liter

Pumped into the tank at the rate=5 L/min

We have to find the number A(t) of grams of salt in the tank at time t.

Rate of change of salt in the tank

$\frac{dA}{dt}=$ Rate in-Rate out

Rate in=5 L/min

Rate out= $\frac{A}{250}\times 5=\frac{A}{50}$ L/min

$\frac{dA}{dt}=5-\frac{A}{50}=\frac{250-A}{50}$

$\int \frac{50dA}{250-A}=\int dt$

$-50ln(250-A)=t+C$

Using the formula

$\int \frac{dx}{x}=ln x$

A=40 and t=0

$-50ln(250-40)=0+C$

$-50ln(210)=C$

Substitute the value

$-50ln(250-A)=t-50ln(210)$

$-50ln(250-A)+50ln(210)=t$

$50ln\frac{210}{250-A}=t$

$t=50ln\frac{210}{250-A}$

$\frac{t}{50}=ln\frac{210}{250-A}$

$\frac{210}{250-A}=e^{\frac{t}{50}$

$\frac{250-A}{210}=e^{-\frac{t}{50}}$

$250-A=210e^{-\frac{t}{50}}$

$A(t)=250-210e^{-\frac{t}{50}}$

8 0

4 years ago

Dependent or independent

Vedmedyk [2.9K]

The probability of coin landing with heads is an independent event.

The probability of winning 1st and 2nd prize is a dependent event.

<h3>What are independent and dependent events?</h3>

Independents events are events whose occurrence do not depend on each other. They are random events. The probability of a coin landing on heads is a random event.

Dependent events are events that are not random. The outcome of one event depends on the outcome of another event.

To learn more about independent events, please check: brainly.com/question/13075229

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6 0

3 years ago

1/10 of 3000 is 10 times as much as

Andreyy89

The answer is: 30 goodluck!!!!!!!!!!!!!!!!!!!!!!!!!!

4 0

4 years ago

Read 2 more answers