Simplify into one fraction -5 / x - 3 - -4 / x + 2

To simplify the expression we shall have:
-5/(x-3)--4/(x+2)
=-5/(x-3)+4/(x+2)
putting the fraction under the same denominator
[-5(x+2)+4(x-3)]/[(x-3)(x+2)]
=[-5x-10+4x-12]/[(x-3)(x+2)]
=[-x-22]/[(x-3)(x+2)]
 
[-x-22]/[(x-3)(x+2)]

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