It will reach its maximum height at the vertex of the parabola. Which is always:
(-b/(2a), (4ac-b^2)/(4a))
So the time when this occurs is the x coordinate, or t in this case.
-b/(2a), and b=672 and a=-16 so
t=-672/-32
t=21 seconds
Answer: The first pair of triangles can be proven congruent by SAS.
Step-by-step explanation:
SAS postulate says that if two sides and the included angle of a triangle are equal to two sides and the included angle of another triangle, then the two triangles are said to be congruent.
In the first pair of triangles the included angle of a triangle are equal to two sides and the included angle of another triangle, therefore by SAS postulate the two triangles are said to be congruent.
In the second figure, the pair of triangles are congruent by ASA postulate not SAS.
In the third figure, the pair of triangles are not congruent by any postulate or theorem [Because there is no SSA rule].
In the fourth figure, the pair of triangles are congruent by SSS postulate not SAS.
Answer:
x = 29 , b = -3
Step-by-step explanation:
<u>5 = b + 8</u>
5 - 8 = b
-3 = b
b = -3
<u>2x + 3b = 156</u>
156 / 3 = 52
52 / 2 = 26
x + b = 26
26 + 3 = 29
x = 29
Answer:
Step-by-step explanation:
-7t +1 = 56
-1. -1
-7t= 55
t = -