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krek1111 [17]
3 years ago
6

Find The Value of X: A= 12 B= 16 C= 21 D= 24

Mathematics
2 answers:
Dmitriy789 [7]3 years ago
5 0

Answer:

x = 21

Step-by-step explanation:

The 2 angles form a straight angle and are supplementary, thus

7x + 9 + 2x - 18 = 180, that is

9x - 9 = 180 ( add 9 to both sides )

9x = 189 ( divide both sides by 9 )

x = 21

neonofarm [45]3 years ago
4 0

Answer:

x = 21

Step-by-step explanation:

The 2 angles form a straight angle and are supplementary

7x + 9 + 2x - 18 = 180

9x - 9 = 180

9x = 189

x = 21

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This is 15 points for whoever answers.
zalisa [80]

Answer:

Y = 40

Step-by-step explanation:

First, find the slope-intercept of the table

Slope-intercept form: y = mx + b

m=\frac{y_2-y_1}{x_2-x_1}

(3, 1) and (6,2)

m=\frac{y_2-y_1}{x_2-x_1}\\\\m=\frac{2-1}{6-3}\\\\m=\frac{1}{3}

y=mx+b

y=\frac{1}{3}x+b

Find b using (6,2):

y=\frac{1}{3}x+b\\\\2=\frac{1}{3}(6)+b\\\\2=\frac{6}{3}+b\\\\2=2+b\\\\-2\ -2\\\\0=b

y=\frac{1}{3}x+b== > y=\frac{1}{3}x+0== > y=\frac{1}{3}x

y=\frac{1}{3}x

What will be the value of Y when X = 120?

Substitute 120 for x into y=\frac{1}{3}x

y=\frac{1}{3}x\\\\y=\frac{1}{3}(120)\\\\y=\frac{120}{3}\\\\y=40

(120, 40)

Therefore, when X = 120, Y = 40

Hope this helps!

7 0
2 years ago
What is the function of delta sign in maths
gladu [14]
The uppercase delta Δ means "change in" so for example: Δx = difference between two x values.

The lowercase delta which Brainly does not have, looks like a squiggly lowercase d. It generally means "very small change in".
7 0
3 years ago
Factorise 2xsquared X 7x +3
Monica [59]

Answer:

 (-2x - 1) • (x + 3)

Step-by-step explanation:

3.2     Factoring  2x2 + 7x + 3

The first term is,  2x2  its coefficient is  2 .

The middle term is,  +7x  its coefficient is  7 .

The last term, "the constant", is  +3

Step-1 : Multiply the coefficient of the first term by the constant   2 • 3 = 6

Step-2 : Find two factors of  6  whose sum equals the coefficient of the middle term, which is   7 .

     -6    +    -1    =    -7

     -3    +    -2    =    -5

     -2    +    -3    =    -5

     -1    +    -6    =    -7

     1    +    6    =    7    That's it

Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above,  1  and  6

                    2x2 + 1x + 6x + 3

Step-4 : Add up the first 2 terms, pulling out like factors :

                   x • (2x+1)

             Add up the last 2 terms, pulling out common factors :

                   3 • (2x+1)

Step-5 : Add up the four terms of step 4 :

                   (x+3)  •  (2x+1)

            Which is the desired factorization

5 0
3 years ago
7(3w-3)=-12<br> HURRY PLEASE
Lady_Fox [76]

Answer:

3/7

Step-by-step explanation:

21w - 21 = -12

21w = -12 +21

21w = 9

w = 9/21

i.e w= 3/7

8 0
3 years ago
Read 2 more answers
How do you categorize each of these questions as one of these types
Sindrei [870]

The statistical questions are:

  • On average, how many books does each person in the United States read each year
  • Which book was read most by students in the class, this summer

The non-statistical questions are:

  • How many acts are there in the play Romeo and Juliet
  • How many books are in the class right not

<h3>How to categorize the questions?</h3>

As a general rule, questions whose answers can be determined using a single data point are non-statistical questions.

Using the above rule, we have the non-statistical questions to be:

  • How many acts are there in the play Romeo and Juliet
  • How many books are in the class right not

As a general rule, questions whose answers cannot be determined using a single data point are statistical questions.

Using the above rule, we have the statistical questions to be:

  • On average, how many books does each person in the United States read each year
  • Which book was read most by students in the class, this summer

Also, both statistical questions are numerical

Read more about statistical questions at

brainly.com/question/12150562

#SPJ1

6 0
2 years ago
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