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Shtirlitz [24]
3 years ago
10

3x – 7(4 + 2x) = –x + 2 Answer?? Idk how to do this

Mathematics
2 answers:
lesantik [10]3 years ago
6 0
<u>3x-7(4+2x)=-x+2</u> first step is to distribute the -7 into the (4+2x) this is done by multiplying the -7 to the 4 and them doing the same for the 2x
<u>3x-28-14x=-x+2</u> next you combine like terms as in all the x's you do this by adding the -14x and the 3x together
<u>-11x-28=-x+2 </u> next you put all the x's on one side
<u>+x         +x</u>
<u>-10x-28=2</u> <u />next you add 28 to both sides to combine your final like terms
      <u>+28 +28 
-10x=30</u> the last step is to divide -10x and 30
<u>/-10x /-10x
</u><u>x=-3</u>
AnnZ [28]3 years ago
5 0
&#10;3x - 7(4 + 2x) =-x + 2\\&#10;3x-28-14x=-x+2\\&#10;-10x=30\\&#10;x=-3
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NO MULTIPLE CHOICE<br><br><br> Find the length of AB label sides find angles HELP ME PLEASE
Ugo [173]

Answer:

8.4 (rounded to 1 dp)

Step-by-step explanation:

1) Identify the number of angles and sides given if you cannot use Pythagoras or SohCahToa.

2) You have 2 angles and 1 side, so you know you must use sine rule: <em>a </em>over sinA =<em> b </em>over sinB

<em>a</em> = side length, sin(A) = angle opposite side

<em>b</em> = side length, sin(B) = angle opposite side

3) This means:

13/sin(90) = x/sin(40)

4) rearrange for x:

x = 13/sin(90) * sin(40)

  = 8.356...

5) Round to however many sig figs/dps they're asking for

Example: 1 dp

AB = 8.4

3 sig figs

AB = 8.36

7 0
3 years ago
Read 2 more answers
Drag the tiles to the correct boxes to complete the pairs. Not all tiles will be used. Match the expressions given in words with
blsea [12.9K]

The matching is done below

<h3>What is expression?</h3>

An expression is a combination of numbers, variables, functions (such as addition, subtraction, multiplication or division etc.)

1) 3 is the difference of 2 times d minus 3.

As, 2*d - 3

=2*3 - 3

=6 - 3

= 3

2) 4 is 4 added to the difference of d minus 3.

or, 4 + (d - 3)

or, 4 + (3 - 3)

or, 4 + 0 = 4

3) 0 is  the difference of d minus 3 divided by 2.

(d - 3)/2

= (3 - 3)/2

= 0/2

= 0

4) 2 is the quotient of 12 divided by the difference of 3 times d minus 3.

12/(3d - 3)

=12/(3*3 - 3)

=12/(9 - 3)

=12/6

= 2

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brainly.com/question/14083225

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2 years ago
Find the slope of a line that is perpendicular to the line y= - 1/3x+7
adell [148]

the slope of the line is 3

7 0
3 years ago
Brainliest if you are right
amid [387]

Answer:

e

Step-by-step explanation:

because the lines are less scattered and they all are going straight up. they are also higher then all of the other ones.

5 0
3 years ago
If two fair dice are rolled, what is the probability that the total showing is either even or less than five?
snow_tiger [21]

The Probability that the total showing is either even or less than five = 5/6

<h3>What is Probability?</h3>

The area of mathematics known as probability deals with numerical representations of the likelihood that an event will occur or that a statement is true. The probability of an event is a number between 0 and 1, where, broadly speaking, 0 represents the event's impossibility and 1 implies certainty.

<h3>According to the given data:</h3>

The example space for rolling two dice is:

(1,1) (1,2) (1,3) (1,4) (1,5) (1,6)

(2,1) (2,2) (2,3) (2,4) (2,5) (2,6)

(3,1) (3,2) (3,3) (3,4) (3,5) (3,6)

(4,1) (4,2) (4,3) (4,4) (4,5) (4,6)

(5,1) (5,2) (5,3) (5,4) (5,5) (5,6)

(6,1) (6,2) (6,3) (6,4) (6,5) (6,6)

36 events total.

Events that have a sum that is even or less than Five .

Total instances when the aggregate is even or less than Five equals 30.

P(sum is even or less than 5)

= (Total no of favorable event)/(Total no of event)

= 30/36

=5/6

probability that the total showing is either even or less than five = 5/6

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6 0
2 years ago
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