8-z/3 is greater than or equal to 11

z ≤ 25

Step-by-step explanation:

multiply each side by 3 to get:

8 - z ≥ 33

-z ≥ 25

z ≤ -25

(you have to switch the inequality symbol when dividing or multiply by a negative)

14 ft 7 inches

step-by-step explanation:

since each model inch corresponds to 25 real inches, 7 model inches will correspond to

7×25" = 175"

at 12" per foot, that is 14 feet, 7 inches.

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!