Answer:
x = - 3 ± 3
Step-by-step explanation:
given the equation x² + 6x - 9 = 0
We can solve for x using the quadratic formula
x = ( - b ± 
) / 2a
with a = 1, b = 6 and c = - 9
x = ( - 6 ± 
) / 2
= ( - 6 ± 
) / 2
= ( - 6 ± 
) / 2
= ( - 6 ± 6 ) / 2
x = - 3 ± 3
Answer:
Step-by-step explanation:
Complementary angles form a right angle and supplementary angles form a straight angle.
<h3>#7</h3>
<u>Complementary:</u>
<h3>#8</h3>
<u>Supplementary:</u>
- 2x + 6x + 20 = 180
- 8x = 160
- x = 20
Answer:
For this case we have the following equation:
Ax - By = C
From here, we must clear the value of x.
Adding By on both sides:
Ax = By + C
Then, dividing both sides by A we have:
x =By +C/A
Answer:
x = By+C/A
x equals the quantity B times and plus C all over A
See the attached picture:
Cos(x°) = (√3)/2
cos⁻¹[(√3)/2] = x°, that means x° = 30°
