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solmaris [256]
3 years ago
6

3x+2(x+4)=5(x+1)+3. Show work please

Mathematics
1 answer:
Nesterboy [21]3 years ago
6 0
First, we distribute the 2 through the parenthesis.

3x+2x+8=5(x+1)+3

Then we distribute the 5 through the parenthesis

3x+2x+8=5x+5+3


Collect the like terms

5x+8=5x+5+3

Add the numbers

5x+8=5x+8

The statement is true for any value of x, because both sides are identical

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Y=x+1 and y=-x-3 in graphing,Substitution,and elemination
marysya [2.9K]

\left\{\begin{array}{ccc}y=x+1\\y=-x-3\end{array}\right\\\\GRAPHING\ \text{(look at the picture)}\\\\y=x+1\\for\ x=0\to y=0+1=0\to(0,\ 1)\\for\ x=-1\to y=-1+1=0\to(-1,\ 0)\\\\y=-x-3\\for\ x=0\to y=-0-3=-3\to(0,\ -3)\\for\ x=-3\to y=-(-3)-3=0\to(-3,\ 0)\\\\Solution:\ (-2,\ -1)


SUBSTITUTION\\\\\left\{\begin{array}{ccc}y=x+1\\y=-x-3\end{array}\right\\\\\text{substitute}\ y=-x-3\ \text{to the first equation}\\\\-x-3=x+1\ \ \ \ |+3\\-x=x+4\ \ \ \ |-x\\-2x=4\ \ \ \ |:(-2)\\x=-2\\\\\text{substitute the value of x to the second equation}\\\\y=-(-2)-3=2-3=-1\\\\Solution:\ (-2,\ -1)


ELIMINATION\\\\\underline{+\left\{\begin{array}{ccc}y=x+1\\y=-x-3\end{array}\right}\ \ \ |\text{add both sides of the equations}\\.\ \ \ \ 2y=-2\ \ \ \ |:2\\.\ \ \ \ \ \ y=-1\\\\\text{put the value of y to the first equation}\\\\-1=x+1\ \ \ \ |-1\\x=-2\\\\Solution:\ (-2,\ -1)

5 0
2 years ago
Alright I need help again and I will award brainliest if you are correct
Alexxandr [17]

Answer: No Triangle: 30 , 85 , 60, and 2, 8, 10

One Triangle: 7, 24, 25

Many Triangles: 45, 45, 90           5, 15, 160

6 0
2 years ago
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Enter the terms and the coefficients of the expression.
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The terms are 2x, -90y, -40

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3 0
2 years ago
PLEASE HELP ITS FOR A MAJOR TEST
GuDViN [60]

Answer:

57

Step-by-step explanation:

the sum of those two interior angles is equal to the exterior (116), so y = 15 and the measure of angle A is 57 if you plug it in

6 0
2 years ago
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If g(x)=2(x-4) find the value of x of g(x)=20
mrs_skeptik [129]
20=2(x-4)
10=x-4
14=x
x is equal to 14

7 0
3 years ago
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