Answer:
4/5
Step-by-step explanation:
formula for slope is (y2-y1)/(x2-x1)
<em>Answer:</em>
<em>The unknown angles are 45 and 63</em>
<em>Step-by-step explanation:</em>
<em>5x + 7x + 72 = 180 (angle sum property)</em>
<em>12x + 72 = 180</em>
<em>12x = 180 - 72</em>
<em>12x = 108</em>
<em>x = 108/12</em>
<em>x = 9 </em>
<em />
<em>Therefore, 5x = 5*9 = 45</em>
<em> 7x = 7*9 = 63</em>
Books sold. The profit is the difference between the revenue and the cost
