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3 years ago

How to solve x in a step by step response

Mathematics

2 answers:

ivanzaharov [21]3 years ago

5 0

Step 1: Simplify both sides of the equation.x2−7=9Simplify: (Show steps)12x−7=9Step 2: Add 7 to both sides.12x−7+7=9+712x=16Step 3: Multiply both sides by 2.2*(12x)=(2)*(16)x=32

dmitriy555 [2]3 years ago

4 0

X/2 - 7=9
Add 7 to both sides so that it cancels out the -7
x/2= 16
Multiply both sides by 2 so that the only thing remaining on the left side is the variable x.
Final Answer: x=32

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P(less than 5) Write as a fraction,percent and decimal

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2 years ago

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3 years ago

Geometry help please

lina2011 [118]

Hello!

The equation to find the volume of a cone is

$\pi r^{2} \frac{h}{3}$

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Put in the values we know

$3.14 * 9^{2} * \frac{4}{3}$

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$3.14 * 81 * \frac{4}{3}$

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7 0

3 years ago

Solve the system by substitution

Lina20 [59]

Answer:

(-5, -30)

Step-by-step explanation:

We start with the equation:

y = 6x

y = -4x - 50

Since both of them are equal to y, we can substitute the 6x into y. So:

6x = -4x - 50

Now we can solve for x. Add 4x to both sides...

6x = -4x - 50

+4x +4x

10x = -50

Now, divide both sides by 10.

10x = -50

10 10

x = -5

So, we now know that x is -5. Now we know this, we can substitute -5 where we see x. It works in both equations, so I will do both.

y = 6(-5)

y = -30

And...

y = -4(-5) - 50

y = 20 - 50

y = -30

As you can see, both equations show that y = -30. To check our work, let's plug in the values.

-30 = 6(-5)

-30 = -30

Also:

-30 = -4(-5) - 50

-30 = -20 - 50

-30 = -30

So, we can see that both of the equations gave us the same answer. So, our answer is x = -5 and y = -30, so the ordered pair is: (-5, -30). Hope this helps you!

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3 years ago

HELP ME ITS MATH PLEASE

REY [17]

Answer:

so the first one unselect

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the fourth one check it

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4 0

3 years ago

Read 2 more answers