Answer:
This is just the application of Pythagoras theorem
To find how high up the wall the ladder reach
⇒ 13^2 = x^2 + 5^2
therefore x^2 = 13^2 - 5^2
x^2 = 169 -25
x^2 = 144
x = 12
therefore the ladder is 12 foot high up the wall
Step-by-step explanation:
7
form a proportion
12/2=42/x
cross multiply
12x=84
x=7
6: 6, 12, 18, 24, 30, 36, 42, 48, 54
14: 14, 28, 42, 56
the LCM (least common multiple) is 42.
Answer: c.) x = 7
