salvadorperez26
31.08.2020 •
Mathematics
Consider three parallel lines r, set cut by a transversal line that respectively at points A, B and C. Let E be a point on the line r so that CE is perpendicular to the line r and intersects the line s at point D. If m (AB ) = 12cm, m (BC) = 6cm, ex = 45º determine m (AD) in (BE).
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Ответ:
b. 3.2 seconds
Step-by-step explanation:
Given the 2 functions:
h = 9t
h= -16t² + 60t
When the height is the same for both objects:
9t = -16t² + 60t
0 = -16t² + 60t - 9t
0 = -16t² + 51t
0 = t(-16t + 51)
which has two solutions:
t = 0
or
-16t + 51 = 0
51 = 16t
t = 51/16 = 3.2