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sleet_krkn [62]
3 years ago
6

Simplify by adding (x+4) +(2x-7)

Mathematics
2 answers:
slega [8]3 years ago
7 0

Answer:

3x - 3

Step-by-step explanation:

Hello!

The first thing you want to do is REMOVE the parentheses, because they are not needed. The equations in them have already been FULLY SIMPLIFIED.

But, DON'T throw those parentheses away! Our next step is to RE-ARRANGE our terms. Have the 'x terms' on one side, and the constants on the other, putting those parentheses around the two. Your equation should look like:

(x + 2x) + (4 - 7)

Our final step is to simplify.

(1)x + 2x = 3x

4 - 7 = -3

Therefore, your final answer is 3x - 3

Hope this helped!

-Mary

AfilCa [17]3 years ago
6 0

Answer:

3x - 3

Step-by-step explanation:

(x + 4) + (2x - 7) =

The first step is to drop the parentheses since they are unnecessary.

= x + 4 + 2x - 7

Now group like terms together.

= x + 2x + 4 - 7

Combine like terms.

= 3x - 3

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Write “2/3x-1/3y=2” in standard form
jenyasd209 [6]

Answer:

2x-y=2

Step-by-step explanation:

first, the easiest thing to do is multiply the whole thing by 3, since the fractions's denominators are the same.

you should get:

2x -y = 2

standard form formula = Ax + By = C

so luckily, the equation above we just solved is already in standard form after multiplying everything by 3

<em>remember</em><em> </em><em>that</em><em> </em><em>in</em><em> </em><em>standard</em><em> </em><em>form</em><em>, </em><em>A</em><em> </em><em>cannot</em><em> </em><em>be</em><em> </em><em>negative</em><em>, </em><em>and</em><em> </em><em>we</em><em> </em><em>can't</em><em> </em><em>have </em><em>any</em><em> </em><em>fractions</em><em> </em><em>in</em><em> </em><em>the</em><em> </em><em>equation</em>

7 0
4 years ago
Please help me my mums gonna kill me if I fail this assignment.
Vika [28.1K]

Answer:

17 in,3 in, and 19in

so the third answer

Step-by-step explanation:

6 0
4 years ago
Solve for x. have to turn in by tomorrow !
Mademuasel [1]
You'll do the (whole)(outside)= (whole)(outside) so, set it up like this: (5+3)3= (x+4)4now work it out with PEMDAS: 15+9=4x+16combine like terms: 24= 4x+16subtract the 16 from each side: 8=4xlastly, divide by 4 on each side to get x=2

got this from someone who answered this for me 
5 0
4 years ago
The axis of symmetry for the graph of the function is f(x) = x2 + bx + 10 is x = 6. What is the value of b?
joja [24]

Answer:

b=-12

Step-by-step explanation:

we have

f(x)=x^{2}+bx+10

we know that

The equation of a vertical parabola into vertex form is equal to

y=a(x-h)^{2} +k

where

(h,k) is the vertex of the parabola

and the axis of symmetry is equal to x=h

In this problem we have the axis of symmetry x=6

so

the x-coordinate of the vertex is equal to 6  

therefore

For x=6+1=7 -----> one unit to the right of the vertex

Find the value of f(7)

f(7)=7^{2}+b(7)+10

f(7)=59+7b

For x=6-1=5 -----> one unit to the left of the vertex

Find the value of f(5)

f(5)=5^{2}+b(5)+10

f(5)=35+5b

Remember that

f(5)=f(7) ------> the x-coordinates are at the same distance from the axis of symmetry

so

59+7b=35+5b ------> solve for b

7b-5b=35-59

2b=-24

b=-12


3 0
3 years ago
Read 2 more answers
(6n-7)+(8n+2)=23 HELP FAST PLEASE
nikitadnepr [17]

Answer:

n=2

Step-by-step explanation:

(6n-7)+(8n+2)=23

14n-5=23

14n=28

n=2

3 0
4 years ago
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