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PolarNik [594]
3 years ago
8

Solve y = x^2 - 18 for x.

Mathematics
1 answer:
viva [34]3 years ago
3 0

Answer:

x = √y+18

Step-by-step explanation:

Given

y = x^2-18

In order to solve the equation for x, we have to isolate x on one side of the equation

So,

y+18 = x^2 -18 + 18\\y + 18 = x^2

We have to find the value for x, so taking square root on both sides

\sqrt{x^2} = \sqrt{y+18}

Solving the squre root

x = x = \sqrt{y + 18}

Hence,

x = √y+18 is the correct answer ..

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What is the solutions for x in the equation -2x+14+10x=34
san4es73 [151]

Answer:

x=2.5

Step-by-step explanation:

Put the like terms together, like so:

10x-2x=34-14

The result is this:

8x=20

Simplify to get:

x=2.5

3 0
3 years ago
Read 2 more answers
4k+mn=n-3; solve for n
solong [7]
Since we are solving for n you have to isolate the n. Therefore, you want all the variables with an n in it on one side and all the variables without an n on the other side:) :
4k+3= -mn+n (There were a change in signs because for example you moved the -3 to the other side, therefore it can only be a negative on one side so now you have to change the sign to a positive:) hope you got that)
That would've been your answer because you cannot do anything else...Hope this helped :)

8 0
3 years ago
Use the given similar triangles to find the value of x<br> I need the answer fast please!!
Yuki888 [10]

Answer:

I believe the answer is x=7

Step-by-step explanation:

<em>3x</em> and<em> 4x-1 </em> are corresponding sides and so are <em>14</em> and <em>18</em>.

You cross multiply with the smaller triangle lengths at the top.

3x/(4x-1)= 14/18

Cross multiply to get

18(3x)= 14(4x-1)

54x=56x-14

Subtract 54x on the other side and add 14 to the other (or subtract 56x to the other side)

you get 14=2x and divide 14 by 2 to get x=7

8 0
3 years ago
What is the slope of the graph?
Dennis_Churaev [7]

Answer:

-4

Step-by-step explanation:

Slope can be found with \frac{y2-y1}{x2-x1}

Pick two points on the graph that the line runs through

(-2, 4) will fill the values of x1 and y1, and (-1, 0) will fill the values of x2 and y2

Insert the coordinates into the formula

\frac{0-4}{(-1)-(-2)}

\frac{-4}{-1+2}

\frac{-4}{1}

Therefore the slope is -4

3 0
3 years ago
Which of the following numbers is rational?
anygoal [31]

Answer:

4/5

Step-by-step explanation:

It's rational because it terminates

4 0
3 years ago
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