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3 years ago

HELP THIS WAS DUE THREE DAYS AGO!!!!!!!!!!

Mathematics

1 answer:

Assoli18 [71]3 years ago

3 0

Answer:

Step-by-step explanation:

2. 2c(7c + 1)

3. stays as is

4. 2x^3y^4(4 - 11x^2y^2)

5. ab(10ab + 9b - a)

6. 3m^2(7m^4n^2+2m^2n+5)

7. (a - 8)(a + 8)

8. (y - 17)(y + 17)

9. stays as is

10. (1 - 5n)(1 + 5n)

11. (4x - 7y)(4x + 7y)

12. (w^2 - 10)(w^2 + 10)

13. (c - 9d)(c + 9d)

14. (14a - b)(14a + b)

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On Professor Hardtack's last cost accounting exam, the mean score was 71, the median was 77, and the mode was 81. (a) Check the

Inessa05 [86]

Answer:

A. The distribution should be skewed to the left because the mean is less than the median.

B. Most students scored a C or higher.

Step-by-step explanation:

A. Since mean<median<mode, we have a negative skewness and hence the distribution is skewed to the left.

B. Since the mean score is 71 and the modal score is 81, it is expected that a 'C' should be the lowest grade most students will have.

3 0

3 years ago

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Calculate the area of a rectangular field with perimeter 88 cm and length 18 cm

gogolik [260]

The area of the rectangular field is 468cm².

Step-by-step explanation:

If, length is 18cm; width is unknown( let x represent width). Then,

Perimeter of a rectangle= Length + Width+ Length + Width

88= 18 + x + 18 + x

88= 36 + 2x

88-36 =2x

52= 2x

52/2=2x/2

26=x

•x=26cm

The width of the rectangle is 26cm.

Area of a rectangle= Length × Width

=18cm×26cm

= 468cm².

3 0

2 years ago

Determine whether each set of ordered pairs shown below is from a geometric sequence or from an arithmetic sequence.

daser333 [38]

Using sequences concepts, it is found that:

The set of ordered pairs {(-3, 7.5) , (-2, 10) , (-1, 12.5)} is an arithmetic sequence with equation a(n) = 15 + 2.5d.

The set of ordered pairs {(1, 150) , (2, 112.5) , (3, 84.375)} is a geometric sequence with $a_n = 150(0.75)^{n-1}$ .

<h3>What is an arithmetic sequence?</h3>

In an arithmetic sequence, the difference between consecutive terms is always the same, called common difference d.

The nth term of an arithmetic sequence is given by:

$a(n) = a(0) + nd$

The sequence {(-3, 7.5) , (-2, 10) , (-1, 12.5)} continues with points (0, 15), (1, 17.5), and so on, hence the first term and the common ratio are given, respectively, by:

a(0) = 15, d = 2.5.

Hence the equation is:

a(n) = 15 + 2.5n.

<h3>What is a geometric sequence?</h3>

A geometric sequence is a sequence in which the result of the division of consecutive terms is always the same, called common ratio q.

The nth term of a geometric sequence is given by:

$a_n = a_1q^{n-1}$

For the sequence {(1, 150) , (2, 112.5) , (3, 84.375)}, the first term and the common ratio are given, respectively, by:

$a_1 = 150, q = \frac{112.5}{150} = \frac{84.375}{112.5} = 0.75$

Hence the equation is given by:

$a_n = 150(0.75)^{n-1}$

More can be learned about sequences at brainly.com/question/6561461

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4 0

2 years ago

Three trigonometric functions for a given angle are shown below. cosecant theta = thirteen-twelfths; secant theta = Negative thi

Kay [80]

Answer:

(–5, 12) is the correct answer.

Step-by-step explanation:

We are given the following values:

$cosec\theta = \dfrac{13}{12}\\sec\theta=-\dfrac{13}{5}\\cot\theta =-\dfrac{5}{12}$

Now, we know the following identities:

$sin \theta = \dfrac{1}{cosec\theta}\\cos \theta = \dfrac{1}{sec\theta}\\tan \theta = \dfrac{1}{cot\theta}$

Now, the values are:

$sin\theta = \dfrac{12}{13}\\cos\theta=-\dfrac{5}{13}\\tan\theta =-\dfrac{12}{5}$

Sine value is positive and cos, tan values are negative.

It can be clearly observed that $\theta$ is in 2nd quadrant.

2nd quadrant means, the value of $x$ will be negative and $y$ will be positive.

Let us have a look at the value of $tan\theta$ :

$tan\theta = \dfrac{Perpendicular}{Base}\\OR\\tan\theta = \dfrac{y-coordinate}{x-coordinate} = -\dfrac{12}{5}\\\therefore y = 12,\\x = -5$

Please refer to the attached image for clear understanding and detailed explanation.

Hence, the correct answer is coordinate (x,y) is (–5, 12)

8 0

3 years ago

Help!! i don’t understand geometry

Rudik [331]

I basically solved for x first.
42+43x+1=180
X=3.2 rounded

Next plug in the value of x into the EDC equation
43(3.2)+1=138.6

Then add it to the measure of EDN
138.6+42= 180.6

So the answer is measure of NDC= 138.6

8 0

3 years ago

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