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timama [110]
3 years ago
15

How do i solve x^2+7x=3x

Mathematics
2 answers:
valina [46]3 years ago
7 0
To solve, you must make one side of the equation equal to zero. We can do this by subtracting 3x on both sides of the equation.

<span>x^2 + 7x = 3x
</span>       - 3x    -3x

x^2 + 4x = 0.

Then we substitute the equation into the quadratic equation.

\frac{-b+- \sqrt{b^2-4ac} }{2a}

Where a = 1 b = 4 and c = 0

\frac{-(4)+- \sqrt{(4)^2-4(1)(0)} }{2(1)}

We first solve whats inside the square root.

\frac{-(4)+- \sqrt{16} }{2(1)}

\sqrt{16} = 4

Now we solve for -4 and 4.

-4 - 4 = -8
-4+4=0

Then divide both answer by 2

\frac{-8}{2} = -4
The division of any by zero is zero

So the answer are x = -4 and x = 0
saveliy_v [14]3 years ago
5 0
X^2 + 7x - 3x = 0
Simplify x^2 + 7x - 3x to x^2 + 4x
X^2 + 4x = 0
Factor out the common term x
X ( x + 4 ) = 0
Solve for x
X = 0,-4
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3 years ago
Find the radius of a circle that has an area of 6.76 cm². Use it for pi.
Inessa05 [86]

Answer:

<h2>radius = 1.47 cm</h2>

Step-by-step explanation:

Area of a circle = πr²

where

r is the radius

From the question

Area = 6.76 cm²

To find the radius substitute the value of the area into the above formula and solve for the radius

That's

6.76 = \pi \:  {r}^{2}

Divide both sides by π

We have

{r}^{2}  =  \frac{6.76}{\pi}  \\ r =  \sqrt{ \frac{6.76}{\pi} }

r = 1.46689291

We have the final answer as

radius = 1.47 cm

Hope this helps you

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3 years ago
Marcus is a car salesman and he earned an 8% commission on his monthly sales last month his sales total was $95,342 how much com
alukav5142 [94]

Answer:

7627.36

Step-by-step explanation:

95342 * 8% = 7627.36

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If the cone itself is 7 inches long, and the radius of the cone is 2 inches, what is the entire volume of ice cream in the cone
stepladder [879]
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Step-by-step explanation:

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