Step-by-step explanation:
A) 0.75 is the same as three-quarters. The 0.75 tells us that for every cup of soda, three-fourth cups of flour are needed.
B) Plug 4 into the equation for every f and solve for s. S=0.75(4). You can imagine that as (3×4)/4 then cancel out the fours to get S=3. 3 cups of soda are needed for 4 cups of flour.
C. Plug 1 into the equation for every s and solve for f. 1=0.75f. Divide both sides by 0.75 to get 1/0.75=f. 1/0.75 can be reimagined as 1 × 4/3. This gives us f=4/3, or 1.333.... So 4/3 cups of flour are needed to mix with 1 cup of soda.
