180° - 70° = 110°
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B is the correct answer! U have clicked the right thing...
You have a fraction of 13/20. The 13 is the amount of children that prefer fries out of 20 children in total. Multiply the 20 by 5 and you get 100. Then multiply the 13 by 5 since what you do to the bottom you gotta do to the top and you get 65/100. Next there are 13 adults that prefer fries over 25. 25 times 4 is equal to 100 and what you do to the top you gotta do to the bottom. 13 times 4 is 52. 65/100 children prefer fries and 52/100 adults prefer fries. The first box you put 65, the second box you put 52, and the third you put more likely
5x^2+3x-4=0
<span>x^2+3x/5-4/5=0 </span>
<span>x^2+3x/5=4/5 </span>
<span>x^2+3x/5+9/100=89/100 </span>
<span>(x+3/10)^2=89/100 </span>
<span>x+3/10=±(√89)/10 </span>
<span>x=-3/10±√89/100 </span>
<span>x=-3±(√89/10)</span>