Aspecific shade of red nail polish requires 7 parts red to 2 parts yellow. a mixture contains 35 quarts of red and 8 quarts of yellow. how can you fix the mixture to make the correct shade of red?

Red:yellow=7:2=35:10
add 2 quarts of yellow to the mixture to make it right. 

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post