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3 years ago

For which rational expressions is 8 an excluded value? Check all that apply.

Mathematics

1 answer:

sukhopar [10]3 years ago

6 0

Answer:

im pretty sure its c and d

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Please help me i rlly need it

iogann1982 [59]

Answer:

8.2

Step-by-step explanation:

Use cosine law:

BC² = 7² + 9² - 2(7)(9)cos(60)

BC² = 67

BC = sqrt (67)

BC = 8.1853

BC = 8.2 (nearest tenth)

4 0

3 years ago

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HELP! What does X equal? WILL GIVE BRAINLIEST!

PIT_PIT [208]

X is 31
The triangles are similar so each angle measure is exactly the same. It is just the side lengths that change.

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3 years ago

Rosa budgets her allowance so she uses equal amounts for spending,saving, and gifts. Her weekly allowance is $6.75. How much doe

IrinaK [193]

She saves 2.25$ each week

7 0

3 years ago

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What is the Mean Absolute Deviation of the following data set? {23, 25, 28, 29, 30}

AnnyKZ [126]

Answer:

The mean absolute deviation is 2.4

Step-by-step explanation:

7 0

3 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

6 0

4 years ago