Step-by-step explanation:
Firstly we need to ratio the fertilizer to plant food:
[tex]1\frac{1}{2} : 3 \frac{3}{4}[/tex]
Lets add these two values together:
[tex]1\frac{1}{2} + 3 \frac{3}{4} = 5 \frac{1}{4}[/tex]
So now we know one of each, we can divide the above value into 42 to find out the amount:
42 ÷ [tex]5\frac{1}{4}[/tex] = 8
So this means that 8 portions of each can be used. This can calculate the full ratio by multiplying each ratio by 8:
[tex](1\frac{1}{2} * 8) : (3 \frac{3}{4} * 8)[/tex] =
12 : 30
You have not included the statements although I hope you can decide which statement is true via the explanation above, feel free to comment the different statements if need be.
Hope this helps!