Because he’s taxed by his home planet, Mork pays a tax rate of 45% on his income, while Mindy pays a rate of only 25% on hers. If Mindy earned 4 times as much as Mork did, what was their combined tax rate?  Choose the correct choice from the following.
A) 29%	B) 31%	C) 33%	D) 35%	E) 37%
Let x be Mork's income, then Mindy's income is 4x.   The total tax paid is 0.45x + 1.0x = 1.45x   1.45x / 5x  0.45  + 1.0= 
<gadget id="calculator"> 0.45  + 1.0</gadget>
<output>1.45</output>
1.45x   1.45x / 5x = 0.29   The answer is 29%. 1.45  / 5= 
<gadget id="calculator"> 1.45  / 5</gadget>
<output>0.29</output>
0.29   The answer is 29%.
<result>A</result>
Because he’s taxed by his home planet, Mork pays a tax rate of 45% on his income, while Mindy pays a rate of only 25% on hers. If Mindy earned 4 times as much as Mork did, what was their combined tax rate?