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3 years ago

9 times what equals 72

Mathematics

1 answer:

VashaNatasha [74]3 years ago

5 0

Your answer would be 8, as 8x9 equals 72. Hope this helps!

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Graph f(x) = –2|x + 4| Khan academy

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Answer:

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3 years ago

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Elimination method 3x+4y=18 9x-5y=3

tatiyna

Answer:

The solution would be (10, -3)

Step-by-step explanation:

In order to solve using elimination, multiply the top equation by -3 and then add the equations together.

-9x - 12y = -54

9x - 5y = 3

---------------

17y = -51

y = -3

Now that we have a value for y, we can put it into either equation and solve for x.

3x + 4y = 18

3x + 4(-3) = 18

3x - 12 = 18

3x = 30

x = 10

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3 years ago

Paul bought a discount card for the bus. The card allows him to buy daily bus passes for $1.70. After one month, Paul bought 12

sp2606 [1]

The answer is 20.4 you just multiply 1.70 by 12

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4 years ago

A biologist observed a population of bacteria that grew at a rate expressed by the exponential equation

bearhunter [10]

Answer:

It will take 26.34 minutes for the population to reach 5 times its initial value

Step-by-step explanation:

Exponential Growing

The population of bacteria grows at a rate expressed by the equation:

$f(t)=256e^{0.06111t}$

Where t is in minutes.

We need to know when the population will reach 5 times its initial value. The initial value can be determined by setting t=0:

$f(0)=256e^{0.06111\cdot 0}=256\cdot 1=256$

Now we find the time when the population is 5*256=1,280. The equation to solve is:

$1,280=256e^{0.06111t}$

Dividing by 256:

$e^{0.06111t}=1,280/256=5$

Taking natural logarithms:

$ln\left(e^{0.06111t}\right)=ln5$

Applying the logarithm properties:

$0.06111t=ln5$

Solving for t:

$t=ln5/0.06111=26.34$

It will take 26.34 minutes for the population to reach 5 times its initial value

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4 years ago

PSYCHO15rus [73]

Each pizza being ordered is $9.99

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3 years ago