75/15 is 5, so 15 would be 20%
because 15 is a fifth or 75
Answer:

Step-by-step explanation:
Step 1: Write out equation
d(-3 + x) = kx + 9
Step 2: Distribute
-3d + dx = kx + 9
Step 3: Subtract dx on both sides
-3d = kx - dx + 9
Step 4: Subtract 9 on both sides
-3d - 9 = kx - dx
Step 5: Factor
-3d - 9 = x(k - d)
Step 6: Divide both sides by k - d

Answer:
21% of his students wear glasses
Step-by-step explanation:
The answer is 21% because 21/100 =21
Hope it helps.
Answer:
so i'm assuming you'd use Pythagoras:
so 15^2-12^2=81
square root it=9 which is I
to find T we do 41^2-9^2=1600
square root that is 40 so T=40
Answer:
10 9/25
Step-by-step explanation: