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vova2212 [387]
3 years ago
10

Evaluate 2 4ac if b = 5, a = -2, and c = 0​

Mathematics
1 answer:
andreyandreev [35.5K]3 years ago
7 0

Answer:0

Step-by-step explanation:2 4ac

2×4×-2×0=0

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Which equation does NOT graph a line? A) y = 5 B) y = -3x3 C) y = 2 3 x D) y = −8x
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<span>B) y = -3x3


</span>-----------------------------------
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A rock is thrown upward from a bridge that is 57 feet above a road. The rock reaches its maximum height above the road 0.76 seco
bekas [8.4K]

answer:

f(t) = -9.9788169(t -0.76)^2 +57

Step-by-step explanation:

On this question we see that we are given two points on a certain graph that has a maximum point at 57 feet and in 0.76 seconds after it is thrown, we know can say this point is a turning point of a graph of the rock that is thrown as we are told that the function f determines the rocks height above the road (in feet) in terms of the  number of seconds t since the rock was thrown therefore this turning point coordinate can be written as (0.76, 57) as we are told the height represents y and x is represented by time in seconds. We are further given another point on the graph where the height is now 0 feet on the road then at this point its after 3.15 seconds in which the rock is thrown in therefore this coordinate is (3.15,0).

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f(t) = a(t-0.76)^2 + 57, now we will substitute the other point on the graph or on the function that we found which is (3.15, 0) then solve for a.

0 = a(3.15 - 0.76)^2 + 57

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f(t) = -9.9788169(t-0.76)^2 +57

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2) Estimate:

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Where is the diagram though..

Step-by-step explanation:

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