If C + D = 9 and C and D are positive integers, which of the following is a possible value for 5C + 8D?  Choose the most appropriate option:	A) 55	B) 61	C) 69	D) 90	E) 97
c + d = 11   5c + 8d = 5c + 5d + 3d = 5(c+d) + 3d = 45 + 3d=90=15   90=15   c+d=9=C+15=9=C=9-15=-6   C=-6   5C + 890=5(-6)+8(15)=-30+120= 
<gadget id="calculator">-30+120</gadget>
<output>90</output>
90   Hence, 90 is the right answer.
<result>D</result>
If C + D = 9 and C and D are positive integers, which of the following is a possible value for 5C + 8D?