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.

Where a = 1 b = 4 and c = 0

We first solve whats inside the square root.


Now we solve for -4 and 4.


Then divide both answer by 2

The division of any by zero is zero
So the answer are x = -4 and x = 0
Answer:
1)
°
2)
°
Step-by-step explanation:
1)
As these two angles are supplementary (They add together to equal 180°) we can setup the equation and solve for x.

2)
Again, these two angles are supplementary we can setup the equation and solve for x

3/16 is the answer the answer
Answer:
b
Step-by-step explanation:
The area of a square = s² ← s is the length of the side, hence
s² = 800 ( take the square root of both sides )
s =
≈ 28.28
28.28 is between 28 and 29 → b