Answer:
3.81 s
Step-by-step explanation:
Let's consider the following formula that represents the journey of a falling object.
d = 3 t + 5 t²
where,
- d is the distance measured in feet
- t is the time measured in seconds
We can find the time that it will take to travel 84 feet by replacing d = 84 in the equation.
84 = 3 t + 5 t²
5 t² + 3 t - 84 = 0
We have a = 5, b = 3 and c = -84. We apply the second grade solving formula.
x₁ = 3.81 and x₂ = -4.41
Since the time cannot be negative, the answer is t = 3.81 s
5-2.6= 2.4
2.4/.38= 6.316
6.316
Answer is rounded, not 100% if this is correct but that is how I would solve.
The triangle inequality says that, given a triangle, the sum of the lengths its two smaller sides must be at least the length of the largest side. Looks like we have a triangle whose sides measure 1.3 cm, 4.1 cm, and 8.4 cm. The two smaller sides are 1.3 cm and 4.1 cm, which add to 5.4 cm, but 5.4 is smaller than 8.4.
So no, these sides can't compose a triangle.
Answer:
a^2 - 9x^2y^2
Step-by-step explanation:
(−3xy + a)(3xy + a) =
= (a - 3xy)(a + 3xy)
This is the product of a sum and a difference: (a + b)(a - b) = a^2 - b^2
= a^2 - 9x^2y^2