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cestrela7 [59]
3 years ago
14

What is the solution to 2x+12=5x-9

Mathematics
2 answers:
Sindrei [870]3 years ago
8 0
2x+12=5x-9\ \ \ \ |combine\ like\ terms\\\\2x-5x=-9-12\ \ \ \ \ |simplify\\\\-3x=-21\ \ \ \ \ |:-3\\\\x=7
Wittaler [7]3 years ago
4 0
So 2x+12=5x-9
you want all of the unknowns on one side and all of  the known values on the other or
subtract 2x from both sides
12=3x-9
add 9 to both sides
21=3x
divide both sides by 3
7=x
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Select the correct answer from each drop-down menu. the equation from the graphed line in slope-point form using the point 2,-1
Arada [10]
The formula for point-slope form is y-a=m(x-c), where y and x are variables, a is simply one point in y, m is the slope, and c is simply one point in x. The first thing we can find is m, or the slope. This is found by dividing the change in y over the change in x. The equation for this is (I’ll plug the points in the equation)
\frac{y_{2}-y_{1}}{x_{2}-x_{1}} = \frac{y_{1}-y_{2}}{x_{1}-x_{2}} =  \frac{-1-(-2)}{2-(-2)}=  \frac{-1+2}{2+2} =1/4

Therefore, our answer is the bottom one as our slope is 1/4.

Feel free to ask further questions!
5 0
3 years ago
Read 2 more answers
A national hockey league rink is 115 feet longer than it is wide. If the perimeter of the rink is 570 feet, find the dimensions
ivolga24 [154]

The length of hockey rink is 200 feet and width of hockey rink is 85 feet.

Step-by-step explanation:

Given,

Perimeter of hockey rink = 570 feet

Width of hockey rink = w

Length of hockey rink = w+115

As a hockey rink is in rectangular shape;

Perimeter of rink = 2(Length + Width)

570=2(w+115+w)\\570=2(2w+115)\\570=4w+230\\570-230=4w\\340=4w\\4w=340

Dividing both sides by 4

\frac{4w}{4}=\frac{340}{4}\\w=85

Width of hockey rink = 85 feet

Length of hockey rink = 85+115 = 200 feet

The length of hockey rink is 200 feet and width of hockey rink is 85 feet.

Keywords: rectangle, division

Learn more about division at:

  • brainly.com/question/13018923
  • brainly.com/question/13035995

#LearnwithBrainly

3 0
3 years ago
Does anyone know the answer to this ? *picture attached*
Viefleur [7K]
A



It wont let me send
5 0
3 years ago
2+2=???<br> PLEASE ANSWER
Dvinal [7]

Answer 4

Step-by-step explanation:

4 0
1 year ago
Read 2 more answers
<img src="https://tex.z-dn.net/?f=24x%5E%7B2%7D%2Bbx%5E%7B2%7D%20%3D25x%5E%7B2%7D" id="TexFormula1" title="24x^{2}+bx^{2} =25x^{
Liula [17]

Answer:

x = 0

Step-by-step explanation:

Subtract 25x^2 from both sides

24x^2 + bx^2 - 25x^2 - 25x^2

Simplify

bx^2 - x^2 = 0

Factor bx^2 - x^2: x^2(b - 1)

bx^2 - x^2

Factor out common term x^2

= x^2 (b - 1)

x^2(b - 1) = 0

Using the Zero Factor Principle: If ab = 0 then a = 0 or b = 0

x^2 = 0

Apply rule x^n = 0   x = 0

x = 0

8 0
3 years ago
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