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2 years ago

20 POINTS FOR THIS!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics

2 answers:

Sloan [31]2 years ago

7 0

Answer:

b = 13

Step-by-step explanation:

the value of the discount is a constant, while the total cost of the books is a variable because it depends of the purchase

We can write this equation

5b - 7 = 58

Solve it

1) add 7 at both members

5b -7 + 7 = 58 + 7

5b = 65

2) divide both membera by 5

b = 13

LenaWriter [7]2 years ago

4 0

B=13 add 7 to both numbers then divide by 5

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Round 1,995,298 to the nearest 10,000

snow_tiger [21]

The correct answer is 2,00,000 because

^is the ten thousands and every thing changes because of that

3 0

2 years ago

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In an accounting class of 200 students, the mean and standard deviation of scores was 70 and 5, respectively. Use the empirical

lina2011 [118]

Answer:

a. About 64

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 70

Standard deviation = 5

Use the empirical rule to determine the number of students who scored less than 65 or more than 75?

65 = 70 - 5

So 65 is one standard deviation below the mean

75 = 70 + 5

So 75 is one standard deviation above the mean.

By the Empirical Rule, 68% of the students scored between 65 and 75. The other 100-68 = 32% scored less than 65 or more than 75.

Out of 200, that is

0.32*200 = 64

So the correct answer is:

a. About 64

5 0

3 years ago

3x+2 = 6x-13 what is x

astra-53 [7]

Step-by-step explanation:

$3x + 2 = 6x - 13$

$3x - 6x = - 13 - 2$

$- 3x = - 15$

$x = \dfrac{15}{3}$

$x = 5$

6 0

2 years ago

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missed my lecture and need help with this derivative, I tried looking at online resources but I just got confused so if someone

Zigmanuir [339]

Derivative with respect to x: $12x^2y^2-\frac{z^3}{x}+16x^{15}$

Derivative with respect to y: $8x^3y-4e^zy^3+4$

Derivative with respect to z: $-e^z y^4 +\frac{3z^2}{x^2}$

Step-by-step explanation:

We can calculate three derivatives for this function: the derivative with respect to x, the derivative with respect to y, and the derivative with respect to z.

We start with the derivative with respect to x:

$\frac{df}{dx}=4(3x^{3-1})y^2 -0 +z^3(-x^{-1})+0-16x^{16-1}=\\=12x^2y^2-\frac{z^3}{x}+16x^{15}$

Then we calculate the derivative with respect to y:

$\frac{df}{dy}=4x^3(2y^{2-1})-e^z(4y^{4-1})+0+4y^{1-1}=8x^3y-4e^zy^3+4$

Finally, we calculate the derivative with respect to z:

$\frac{df}{dz}=0-e^z y^4 +\frac{3z^{3-1}}{x^2}+0-0=-e^z y^4 +\frac{3z^2}{x^2}$

Learn more about differentiation:

brainly.com/question/4279146

#LearnwithBrainly

5 0

3 years ago

Can someone please help me?

igomit [66]

Answer:

I don't even see the whole problem?

Step-by-step explanation:

Try asking you Mom/Dad for help.

3 0

2 years ago