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Vikki [24]
3 years ago
11

Simplify by combining like terms 6a + 3b + a + 2

Mathematics
1 answer:
IrinaK [193]3 years ago
6 0

Answer:

7a+3b+2

Step-by-step explanation:

6a+3b+a+2

Use commutative property of addition x+y=y+x

6a+3b+a+2=6a+(a+3b)+2

use associative property of addition x+(y+2)=(x+y)+2

6a+(a+3b)+2=(6a+a)+3b+2\\=7a+3b+2

Hence 6a+3b+a+2=7a+3b+2

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Need help for number 4 please
Marina CMI [18]

Answer:

Step-by-step explanation:

4) ΔSTW ≅ ΔBFN . So, corresponding parts of congruent triangles are congruent.

a) BN = SW                                        d) m∠W = m∠N

  BN = 9 cm                                           m∠W = 82°

b) TW = FN                                        e) m∠B = m∠S

TW = 14 cm                                            m∠B = 67°

c) BF = ST                                          f) m∠B + m∠N + m∠F = 180°

  BF = 17 cm                                                 67 + 82 + m∠F = 180

                                                                            149 + m∠F = 180

                                                                                     m∠F = 180 - 149

                                                                                      m∠F = 31°          

5) ΔUVW ≅ ΔTSR

UV = TS

12x - 7 = 53

   12x   = 53+7

   12x = 60

      x = 60/12

      x = 5

UW =TR

3z +14 = 50

    3z = 50 - 14

   3z = 36

     z = 36/3

    z = 12

SR =VW

5y - 33 = 57

     5y = 57 + 33

     5y = 90

       y = 90/5

       y = 18

7) ΔPHS ≅ ΔCNF

∠C = ∠P

4z - 32 = 36

      4z = 36 + 32

       4z = 68

        z = 68/4

       z = 17

∠H = ∠N

6x - 29 = 115

  6x     = 115 + 29

      6x = 144

        x = 144/6

       x = 24

∠P + ∠H + ∠S = 180   {Angle sum property of triangle}

36 +115 + ∠S = 180

      151   + ∠S = 180

                ∠S = 180 - 151

               ∠S = 29°

∠F = ∠S

3y - 1 = 29

   3y = 29 + 1

  3y = 30

    y = 30/3

    y = 10

8) ΔDEF ≅ ΔJKL

DE = 18    ;  EF = 23

DF = 9x - 23

JL= 7x- 11

DF = JL           {Corresponding parts of congruent triangles}

      9x - 23 = 7x - 11

9x  - 7x - 23 = -11

        2x - 23 = -11

               2x = -11 + 23

               2x = 12

                 x = 12/2

                x = 6      

JK   = DE           {Corresponding parts of congruent triangles}

3y - 21  = 18

       3y = 18 + 21

        3y = 39

         y = 39/3

        y = 13

4 0
3 years ago
Which coordinate plane contains the points (2, 2.5) and ( -4, -4)​
ivann1987 [24]

Answer:

D.

Step-by-step explanation:

That is the only answer provided.

7 0
3 years ago
What is thirty times twenty
wariber [46]

Answer:

600

Step-by-step explanation:

How to do it in your head (secret):

3*2 = 6

add 2 zeros after the 6 since there are 2 zeros in total in this equation 2<u><em>0 </em></u>and 3<u><em>0</em></u> so:

30*20 = 600

:D

6 0
3 years ago
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Suppose an amount increases by 100% percent, then decreases by 100% percent. Find the final amount. Would the situation change i
Oksi-84 [34.3K]
No it will not change it will be 250% then it will decrease 100% down again back to 150%
6 0
3 years ago
The cost of 6 pounds of oranges is $12.06. What is the constant of proportionality that relates the cost and dollars, y, to the
iren2701 [21]

Answer:

I'm not 100% correct but this is what I believe proportionality is where k=y/x and k is proportionality constant

$6.57: 3 pounds of orange

y dollar: x pounds of orange

so the proportion

$6.57 y

_____ = _____

3 x

6.57×

_____ = y

3

2.19x = y

so k = 2.19

8 0
3 years ago
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