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allsm [11]
3 years ago
10

3(2x-1)=5x+3+7x I do t get this cause I’m stupid

Mathematics
2 answers:
Tcecarenko [31]3 years ago
8 0

Answer:

x=-1

Step-by-step explanation:

first you multiply 3 by whats in the parenthesis (you would get 6x-3)

then on the other side you combine like terms (add 7x plus 5x=12x)

Then you would isolate X to one side by subtracting 6x from 12x

Then you would subtract 3 from the side with 12x

By now your equation would be -6=6x

so you would divide both side by negative six to get x=-1

pishuonlain [190]3 years ago
6 0

Answer:

x=-1

Step-by-step explanation:

3(2X-1)=5x+3+7x                  Distribute the 3 into the parenthesis

6x-3=5x+3+7x                      Isolate the x on one side

-6x     -6x

-3=5x+3+7x-6x

-3        -3

-6=5x+7x-6x                         Add all the x's

-6=6x                                    Divide 6 to isolate x

(-6)/6=(6x)/6

-1=x

Now you can check if it's right by inputting -1 for x and seeing if the equations equal each other

3(2(-1)-1)=5(-1)+3+7(-1)

3(-3)=-5+3-7

-9=-9                                   They equal each other so x=-1 is correct

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A roofer calculates his bid price using the formula P = 1.85s + 4.2f, where s is the area of the roof in square feet and f is th
solmaris [256]

Answer: 1,811 square foot

Step-by-step explanation:

Hi, to answer this question we have to solve the equation given, by substituting P = 4,148 and f=190 in the equation.

P = 1.85s + 4.2f

4,148 = 1.85s +4.2 (190)

Solving for s:

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4,148-798 =1.85s

3,350 = 1.85s

3,350/1.85 =s

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Feel free to ask for more if needed or if you did not understand something.

8 0
3 years ago
Read 2 more answers
Determine if (-2,6) and (4,12) are solutions to the system of equations:
kykrilka [37]

Answer:

Both (-2,6) and (4,12) are solutions to the system.

Step-by-step explanation:

In order to determine whether the two given points represent solutions to our system of equations, we must "plug" thos points into both equations and check that the equality remains valid.

Step 1: Plug (-2,6) into y=x+8

(6) = (-2)+8 = 6

The solution verifies the equation.

Step 2: Plug (-2,6) into 2y=x^2 + 8

2(6) = (-2)^2+8=4+8=12

The solution verifies both equations. Therefore, (-2,6) is a solution to this system.

Now we must check if the second point is also valid.

Step 3: Plug (4,12) into y=x+8

(12) = (4)+8 = 12

Step 4: Plug (4,12) into 2y=x^2 + 8

2(12) = (4)^2+8=16+8=24

The solution verifies both equations. Therefore, (4,12) is another solution to this system.

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2 years ago
If two distinct lines intersect, which is NOT necessarily true?
Inessa05 [86]

The lines are perpendicular.

8 0
3 years ago
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