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Maurinko [17]
3 years ago
11

What are 2 equilateral triangles?

Mathematics
1 answer:
vladimir2022 [97]3 years ago
4 0
A square, isosceles triangle or parallelogram 
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3x+9y=12 <br>-3x-6y=18 <br>Solve the system by using elimination​
Ivenika [448]

Answer:  (x, y) = (-26, 10)

This means x = -26 and y = 10 pair up together

===============================================================

How to get that answer:

Add the equations straight down. Think of having 3 separate columns for the three different like terms.

  • 3x + (-3x) becomes 0x and that's just 0. So the x terms go away
  • 9y + (-6y) is the same as 9y-6y which turns into 3y
  • 12 + 18 becomes 30

After all that, we're left with the simpler equation 3y = 30. That solves to y = 10 after dividing both sides by 3.

Plug this back into any equation involving x and y. Solve for x

3x+9y = 12

3x+9(10) = 12

3x+90 = 12

3x = 12-90

3x = -78

x = -78/3

x = -26

We have found that x = -26 and y = 10 pair up together to form the solution.

-------------------

Checking the answer:

Plug (x,y) = (-26, 10) into the first equation

3x+9y = 12

3(-26)+9(10) = 12

-78+90 = 12

12 = 12

We get a true equation since the same thing is on both sides.

Repeat the same idea for the second equation

-3x-6y = 18

-3(-26) - 6(10) = 18

78 - 60 = 18

18 = 18

The second equation is true as well.

Both equations are true, so the solution (x, y) = (-26, 10) is confirmed.

8 0
3 years ago
Read 2 more answers
Please help me find the answer
sattari [20]
133 stickers and 36 markers
6 0
4 years ago
Read 2 more answers
What is the product of <img src="https://tex.z-dn.net/?f=%283y%20%5E%7B-4%7D%29%282y%5E%7B-4%7D%20%29" id="TexFormula1" title="(
ludmilkaskok [199]

Answer:

final answer is 6/(y^8)

Step-by-step explanation:

(3y^-4) = 3/(y^4)

(2y^-4) = 2/(y^4)

3*2 = 6

Add exponents y^4+y^4 = y^8


hence 6 / (y^8)

6 0
4 years ago
Choose the correct simplification of the expression ( 4x/y)^2.
erik [133]

\large\displaystyle\text{$\begin{gathered}\sf \left(\frac{4x}{y}\right)^{2}   \end{gathered}$}

To raise 4x/y to a power, raise the numerator and denominator to the power, and then divide.

\large\displaystyle\text{$\begin{gathered}\sf \frac{(4x)^{2} }{y^{2} }  \end{gathered}$}

Expand (4x)².

\large\displaystyle\text{$\begin{gathered}\sf \frac{4^{2} x^{2} }{y^{2} }  \end{gathered}$}

Calculates 4 to the power of 2 and gets 16.

\boxed{\large\displaystyle\text{$\begin{gathered}\sf \frac{16x^{2} }{y^{2} }  \end{gathered}$} }

6 0
2 years ago
Write a linear equation in standard form that crosses (4,-3) and (-2,9)
Goryan [66]
Y = -2x + 5 
That's the answer and you find it by finding the slope by using (4,-3) and (-2,9). You subtract -3 from 9 over 4 from -2. After you find the slope which would be -2 you use the equation y-y1 = slope(x - x1). You plug in any coordinates and find the answer. 

5 0
4 years ago
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