Answer:

if u substitute the givens in the eqn we will get..

then collect like terms


Equation for length:
l = 3w
l × w = 12
Substitute 3w into L.
(3w) × w = 12
4w = 12
w = 3
Substitute 3 into w to find the length.
l = 3w
l = 3×3
l = 9
The width is 3 and the length is 9.
The vertex is located at (-1,-9)
Step-by-step explanation:
The total number of people who did the survey is 12. The number of people who read 0-2 books is 2, and the number of people who read 3-5 books is 3. Everything else is over 6. So 2+3 is 5.
Therefore, D 5/12 is the answer