3 years ago

Simplify. x + (7 + 14x) 15 x + 7 21 x 22 x 21 x + 1

Mathematics

1 answer:

Gala2k [10]3 years ago

6 0

Answer:

15x+7

Step-by-step explanation:

x+7+14x

x+14x+7

15x+7

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Step-by-step explanation:

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2 years ago

What is the average rate of change of the function f(x)=4(2)^x from x=0 to x=2?

Umnica [9.8K]

I hope this helps you

x=0

f (0)=4.2^0=4

x=2

f (2)=4.2^2=16

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2 years ago

Y= -x +3 and y = x - 1

inysia [295]

Answer:

x=2 and y=1

Step-by-step explanation:

Rewrite equations:

y=−x+3;y=x−1

Step: Solve

y=−x+3

Step: Substitute−x+3foryiny=x−1:

y=x−1

−x+3=x−1

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−2x+3=−1

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(Divide both sides by -2)

x=2

Step: Substitute2forxiny=−x+3:

y=−x+3

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y=1(Simplify both sides of the equation)

Hope this Helps you :)

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3 years ago

Is 0.48 greater than 11/25

Zina [86]

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3 years ago

A test consists of 100 multiple choice questions, each with five possible answers, only one of which is correct. Find the mean a

TEA [102]

Answer: Mean = 20 and standard deviation = 4

Step-by-step explanation:

Let x represents the success of getting the correct answer.

Here, the total number of trials(n) = 100

The probability of getting the correct answer, p = 1/5

Thus, the mean of the number of correct answer,

$\mu_x= np$

$\mu_x= 100\times 1/5$

$\mu_x= 20$

Now, the standard deviation, $\sigma_x= \sqrt{n\times p\times (1-p)}$

$\sigma_x= \sqrt{100\times 1/5\times 4/5}$

$\sigma_x= \sqrt{16}$

$\sigma_x= 4$

Thus, First option is correct.

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3 years ago