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3 years ago

Hello, can someone please explain how to find these? Thank you so much from the bottom of my heart!

Mathematics

1 answer:

Fiesta28 [93]3 years ago

3 0

Answer:

(a) –2.65

(b) 1/8

(d) –7 9/10

Step-by-step explanation:

(a) 5.8 + (–8.45) = 5.8 – 8.45 = –2.65

(b) –3/4 + 7/8 = –6/8 + 7/8 = 1/8

(d) –3 2/5 – 4 1/2 = –17/5 – 9/2 = –34/10 – 45/10 = –79/10 = –7 9/10

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Factor the expression 4x-20

riadik2000 [5.3K]

Answer:

4(x-5)

Step-by-step explanation:

4x-20

Removing the common factor from the two figures,we have,

4(x-5)

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3 years ago

PLEASE HELP.!!!!!! <br><br> m value<br> OF X?

Andre45 [30]

Answer:

CAB = CAD + DAB

161 = (5X + 7) + (3X - 6)

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3 years ago

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PLEASE HELP!!!

viktelen [127]

The answer is 3/5.

$\frac{1}{3} *\frac{3}{5} =\frac{3}{15} \\ \\ \frac{3}{15} *\frac{3}{5} =\frac{9}{75}$

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3 years ago

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During the semester, all the students in a statistics class kept track of the number of mailings they received from a predatory

Verdich [7]

Answer:

The first step on this case is order the dataset on increasing way, and after do this we got:

11 14 15 16 17 17 18 19 21

We have a sample size of n =9

And in order to find the 75th percentile we need to find the position for this percentile with this formula:

$n_{75} = 0.75* 9= 6.75\approx 7$

So then we can conclude that the 75th percentile would be approximately on the 7 position of the dataset ordered and we got:

$x_{75} = 18$

Step-by-step explanation:

For this case we have the following data:

16 17 11 21 15 14 17 18 19

The first step on this case is order the dataset on increasing way, and after do this we got:

11 14 15 16 17 17 18 19 21

We have a sample size of n =9

And in order to find the 75th percentile we need to find the position for this percentile with this formula:

$n_{75} = 0.75* 9= 6.75\approx 7$

So then we can conclude that the 75th percentile would be approximately on the 7 position of the dataset ordered and we got:

$x_{75} = 18$

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3 years ago

PLEASE ANSWER ASAP!!!!!!!!

elena-s [515]

The missing side and angles are 16.8 , 23.33 degree and 123.7 degree respectively.

<h3>What is a Triangle ?</h3>

Triangle is a polygon with three sides , three angles and three vertices.

Given is triangle ABC , with sides a = 8, c = 11, and m∠C=33 degree

The missing angle and side is given by Cosine rule of triangle

c² = a² + b² - 2ab cosC

11² = 8² + b² - 2* 8 * b * cos 33

57 = b² -13.42 b

b² -13.42b -57 = 0

b = 16.8

By sine rule

a / sin A = b/sin B = c/sinC

8 / sin A = 11 / sin 33

A = 23.33 degree

Similarly

B = 123.7 degree

Therefore the missing side and angles are 16.8 , 23.33 degree and 123.7 degree respectively.

To know more about Triangle

brainly.com/question/2773823

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6 0

2 years ago