Answer:
3 ft.
Step-by-step explanation:
When you imagine the sentence, it is a right angled triangle. In this case, it's a Pythagoras Theorem. The formula for it is:
a²(opposite) + b²(adjacent) = c²(hypotenuse)
The building is the opposite, the distance between the foot of the ladder and the building is the adjacent, while the ladder is the hypotenuse.
We have the measurements except for the adjacent. So it will be:
c² - a² = b²
5² - 4² = b²
25 - 16 = b²
9 = b²
√9 = b
b = 3 ft
The answer is 3 ft.
Answer:
154.98
Step-by-step explanation:
* means multiplication
143.50*.08=11.48
143.50+11.48=$154.98
There are infinite solutions.
By observing the inequality, we can tell that the unknown number, n, is greater than the number 4.
Answer:
x = 
, y = 
Step-by-step explanation:
Express as 2 equations, that is
x + y = 1 → (1)
- x + 9y = 1 → (2)
Add the 2 equations term by term to eliminate x, that is
10y = 2 ( divide both sides by 10 )
y = 
=
Substitute this value into (1) and solve for x
x + = 1 ( subtract from both sides )
y = 
- =
