<em>A. x ≤ - 9 or x ≥ 9</em>
- Step-by-step explanation:
<em>x² ≥ 81</em>
<em>| x | ≥ 9</em>
<em>x ≥ 0 => x ≥ 9 => x ∈ [ 9 ; + oo)</em>
<em>x < 0 => x ≤ - 9 => x ∈ ( -oo ; - 9 ]</em>
<em>x ∈ ( -oo ; - 9 ] ∪ [ 9 ; + oo)</em>
Slope-intercept form : y = mx + b
3) y + 4 = x
So, you need to move 4 to the other side, so that y is by itself.
Subtract 4 from both sides.
y = x - 4
~Hope I helped!~
Answer:
If C and D are supplementary angles then C is 65 and D is 115.