5-x= 3. work out the value of 3x^2

Mathematics

2 answers:

lbvjy [14]3 years ago

6 0

NVM

Step-by-step explanation:

Xelga [282]3 years ago

3 0

Answer:

If x =2, then 3x^2 equals 12 :D

Step-by-step explanation:

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What are the solutions 2x^2 +7x=4

elena55 [62]

So your equation is $2x^{2} +7x = 4$ . You need to simplify this answer.
So first off, do 2x times 2x.
2 x 2 = 4.
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Your equation is almost done! It's $11x = 4$ right now.
Divide both sides by 11, and your answer is...
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0.36.

I hope I helped!

8 0

3 years ago

Read 2 more answers

Can you please tell me where I did a mistake.

oksano4ka [1.4K]

Last one should be less than 3/4

7 0

3 years ago

Find the equation of the line that contains the point (4, - 2) and is perpendicular to the line y = - 2x + 5.

Licemer1 [7]

<h3>Answer:</h3>

y=1/2x

<h3>Solution:</h3>

The slopes of perpendicular lines are opposite reciprocals of each other.
The simplest way to determine a number's reciprocal is to flip it over, like so:
$-2 ~ - > -\displaystyle\frac{1}{2}$
Now, change the sign:
$\displaystyle\frac{1}{2}$
So we have the <em>slope </em>of the line that's <em>perpendicular </em>to the given line.
Now, let's find the line's equation.
First, let's write it in Point-Slope Form:
y-y1=m(x-x1)
y-(-2)=1/2(x-4)
y+2=1/2x-2 (Point slope)
Now, convert to slope-intercept:
y=1/2x+2-2
y=1/2x