When h has the value 6 calculate 5h + 9

You multiply 5 and 6 =30 then you add 9 and that's 39 

You said that the value of h is 6 then put the 6 there then you have to multiply the 5*6 you get 30 then  add the 9 and that gives you 39 

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