a, b, c, d and e are 5 consecutive points on a straight line. if bc = 2 cd, de = 7, ab = 5 and ac = 11, what is the length of ae? Answers:	A) 19	B) 21	C) 23	D) 25	E) 27
<gadget id="calculator">11 - 5</gadget>
<output>6</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">11 + 3</gadget>
<output>14</output>

<gadget id="calculator">14 + 7</gadget>
<output>21</output>

<result>B</result>
a, b, c, d and e are 5 consecutive points on a straight line. if bc = 2 cd, de = 7, ab = 5 and ac = 11, what is the length of ae?
add(add(11, divide(subtract(11, 5), 2)), 7)
"ac = 11 and ab = 5 , so bc = 6 . bc = 2 cd so cd = 3 . the length of ae is ab + bc + cd + de = 5 + 6 + 3 + 7 = 21 the answer is b ."