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4vir4ik [10]
3 years ago
15

What is the value of z in the equation 4(2z + 3) = 12?

Mathematics
2 answers:
artcher [175]3 years ago
7 0
First u have to expand the brackets...
4 x 2z = 8z
4 x 3 = 12
8z + 12 = 12
Then you have to get numbers on one side, and letter on the other...
8z -12 = 12-12
8z = 0
then u have to divide 8z by 8 to find 1z or just z.
z = (0/8) = 0
z=0
Hope this helps :)
xxMikexx [17]3 years ago
6 0
<span>4<span>(<span><span>2z</span>+3</span>)</span></span>=<span>12
</span><span><span><span><span>(4)</span><span>(<span>2z</span>)</span></span>+<span><span>(4)</span><span>(3)</span></span></span>=12</span><span>(Distribute)
</span><span><span>8z</span>+12</span>=<span>12
</span><span>Step 2: Subtract 12 from both sides
</span><span><span><span>8z</span>+12</span>−12</span>=<span>12−<span>12
</span></span><span>8z</span>=<span>0
</span><span>Step 3: Divide both sides by 8
</span><span><span>8z/</span>8</span>=<span>0/<span>8
</span></span>z=<span>0</span>
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sleet_krkn [62]

Answer:

Midpoint = (3.5, 4.5)

Perpendicular bisector = y =  \frac{7}{9} x + \frac{16}{9}

Step-by-step explanation:

[] We can solve this using the midpoint formula:

-> See attached

[] Plug-in our coordinates and solve:

(\frac{7+0}{2} ,\frac{0+9}{2} )=(\frac{7}{2} ,\frac{9}{2} )=(3.5,4.5 )

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\frac{9-0}{0-7}=\frac{9}{-7}

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y - 4.5 = \frac{7}{9} x-\frac{49}{18}

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y =  \frac{7}{9} x + \frac{16}{9}

Have a nice day!

     I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)

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The point is (7,0).

Step-by-step explanation:

The equation of a linear function in point-slope form is as follows :

y-y_1=m(x-x_1) ...(1)

Where

(x₁,y₁) are the coordinates of the point which  the line passes through it and (x,y).

Harold correctly wrote the equation y= 3(x–7)

or we can write it as :

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So, the point is (7,0).

The correct option is (c).

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3 years ago
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