Answer:
The actual building is 13.3 feet tall.
Step-by-step explanation:
Let the actual height be 'x'.
Given that on a scale drawing with a scale of 1/20, the height of the building is 8 inches, the expression becomes
(1/20) × x = 8
x = 20 × 8 = 160 inches
We know that
Thus,
160 inches = 160/12 ≈ 13.3 feet
Therefore, the actual building is 13.3 feet tall.
Answer:
Step-by-step explanation:
Let's find the discriminant
It is a positive number, therefore there are 2 solutions
Step-by-step explanation:
p = 2×( l+w)
p = 2×l + 2×w
=> 2×w = p - 2×l
w = (p - 2×l) / 2
w = (11 - (2×2.8))/2
= (11- 5.6)/2
= 5.4 /2
= 2.7 cm
Answer:
m = n = 2
Step-by-step explanation:
(m + n√2)(1 - √2)² = -2 + 2√2
(m + n√2)(1 - 2√2 + 2) = -2 + 2√2
(m + n√2)(3 - 2√2) = -2 + 2√2
3m - 2m√2 + 3n√2 - 4n = - 2 + 2√2
(3n - 2m)√2 + 3m - 4n = 2√2 - 2
3n - 2m = 2
4n - 3m = 2
3n - 2m = 4n - 3m
n = m
4n - 3n = 2
n = 2
m = 2
Hope this helps.