safelix1260
16.01.2020 •
Mathematics
Which equation could generate the curve in the graph below?
y = 3x2 – 2x + 1
y = 3x2 – 6x + 3
y = 3x2 – 7x + 1
y = 3x2 – 4x – 2
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Ответ:
Then, that is the answer.
To verify that you can calculate the discriminant, b^2 - 4(a)(c), for each equation and use these facts:
If b^2 - 4(a)(c) = 0, there is only one real root (the graph touches the x-axis in one point)
If b^2 - 4ac > 0, there are two real roots (the graph touches the x-axis in two different points)
If b2 - 4ac < 0, there are no real roots (the graph does not touch the x-axis). This is the case for y = 3x^2 - 2x + 1. (-2)^2 -4(3)(1) = 4 - 12 = -8 < 0 => not real roots.
Ответ:
93 m
Step-by-step explanation:
given that the scale is 1:1000
this means that 1 cm of the model = 1000 cm in the actual statue
it is given that the model is 9.3 cm tall,
this means that the actual statue is,
= 9.3 x 1000
= 9300 cm
= 93 m tall