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sesenic [268]
3 years ago
9

Find the value of x. 3x +7 D 2x + 7 3x 16

Mathematics
2 answers:
Mashcka [7]3 years ago
7 0

Answer:

sum of interior angle of a triangle is 180 degree

so,

3x +7 + 2x+7 +3x+6 = 180

8x + 20 = 180

8x = 180 - 20

8x = 160

x = 160/ 8

x = 20

May it will help you

evablogger [386]3 years ago
5 0

Answer:

x = 20

Step-by-step explanation:

According to angle sum property of a triangle , sum of all the angles in a triangle is equal to 180°.

So,

(3x + 7) + (2x + 7) + (3x + 6) = 180

=  > 8x + 20 = 180

=  > 8x = 180 - 20 = 160

=  > x =  \frac{160}{8}  = 20

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Brianna and let kelci are raising money for a class field trip. Brianna has raised 3 times more money than kelci, but together t
ddd [48]
Let $x be the amount of money which Kelci has raised. <span>Brianna has raised 3 times more money than kelci, then she has raised $3x. Totally both have aised $(x+3x)=$4x.
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Since <span>together they have raised more than $300, then 4x>300,
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x\ \textgreater \  \dfrac{300}{4}.
Answer: the <span>inequality  </span><span><span>x\ \textgreater \  \dfrac{300}{4} </span>can be used to determine the amount of money kelci has raised</span>


7 0
3 years ago
I need help with this
Ksenya-84 [330]

Answer:

6.7-(-2.5)=9.2                  6.7+(-2.5)=4.2                          Neither

2.5 + 6.7                          6.7 - 2.5                                  2.5 - 6.7

                                       -2.5 + 6.7                                 -2.5 - 6.7

                                                                                        -6.7 + 2.5

7 0
3 years ago
Can someone help me with this I don’t understand
solniwko [45]

Answer:

the fastest is 12 meters every 4 seconds

slowest is 8 meters every 6 seconds

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
1 point
galina1969 [7]

Answer:

(B) 20

Step-by-step explanation:

Let small puppet be represented by-----------------s

Let large puppet be represented by-----------------l

Total number of puppets expression will be: s+l =25---------a

The expression for total costs will be : 1$ s + $2l=$30-------b

Equation a can be written as; s= 25-l ------------c

Use equation c in equation b as

$1( 25-l )+$ 2l = $30

25-l + 2l = 30

25+l =30

l= 30-25 =5

l, large puppets = 5

s, small puppets = 25-5 = 20

Answer choice A is incorrect because 25 is the total number of all puppets

Answer choice C and D are incorrect because the numbers are less that that of small puppets.

3 0
3 years ago
8/7 = 12/k solve for k
Serjik [45]

Answer:

k = 10.5

Step-by-step explanation:

8/7 = 12/k

Using cross products

8k = 7*12

8k = 84

Divide each side by 8

8k/8 = 84/8

k = 10.5

7 0
3 years ago
Read 2 more answers
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