Answer:
![y = \frac{z^2 - x}{2}](https://tex.z-dn.net/?f=%20y%20%3D%20%5Cfrac%7Bz%5E2%20-%20x%7D%7B2%7D%20)
Step-by-step explanation:
Given:
![\sqrt{x + 2y} = z](https://tex.z-dn.net/?f=%20%5Csqrt%7Bx%20%2B%202y%7D%20%3D%20z%20)
Required:
Solve for y (make y the subject of the formula)
SOLUTION:
![\sqrt{x + 2y} = z](https://tex.z-dn.net/?f=%20%5Csqrt%7Bx%20%2B%202y%7D%20%3D%20z%20)
Square both sides
![(\sqrt{x + 2y})^2 = z^2](https://tex.z-dn.net/?f=%20%28%5Csqrt%7Bx%20%2B%202y%7D%29%5E2%20%3D%20z%5E2%20)
![x + 2y = z^2](https://tex.z-dn.net/?f=%20x%20%2B%202y%20%3D%20z%5E2%20)
Subtract both sides by x
![2y = z^2 - x](https://tex.z-dn.net/?f=%202y%20%3D%20z%5E2%20-%20x%20)
Divide both sides by 2
![y = \frac{z^2 - x}{2}](https://tex.z-dn.net/?f=%20y%20%3D%20%5Cfrac%7Bz%5E2%20-%20x%7D%7B2%7D%20)
Answer:
7) G
8) F & G
9) H
i think this is right, hope i helped :)
Answer:
-3
Step-by-step explanation:
y = -3x
This is in slope intercept form
y = mx+b where m is the slope and b is the y intercept
The slope is -3 and the y intercept is 0
50/1 * 1/25 = 50/25 = 2
75/1 * 1/25 = 75/25 = 3
The reduced painting is 2cm x 3cm