69.75 x 0.05 = $3.49 discount
$69.75 - $3.49 = $66.26 discounted price with tax
66.26 x 0.18 = $11.93 tip
Discounted price with tax + tip
66.26 + 11.93 = 78.19
Answer:
You can use Desmos, or any online graph-er to graph the line.
Answer: 45 Degrees
Step-by-step explanation:

<em>Subtract</em> 2/3x on both sides.

Combine 5/3x and -2/3x to get x.

Subtract 4 from both sides. <em>Any value</em> subtracted from zero results in its negative value.