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khliyahmccaskil
18.10.2019 •
Mathematics
The function g(x) = 10x2 – 100x + 213 written in vertex form is g(x) = 10(x – 5)2 – 37. which statements are true about g(x)? check all that apply.
the axis of symmetry is the line x = –5.
the vertex of the graph is (5, –37).
the parabola has a minimum.
the parabola opens up.
the value of a, when the equation is written in vertex form, is negative.
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Ответ:
The true statements are:-
The vertex of the graph is (5, –37).
The parabola has a minimum.
The parabola opens up.
Step-by-step explanation:
We know that for the standard vertex form , where(h,k) is the vertex of the curve.
Given function:- written in vertex form
The a=10 which is not negative.
⇒It is a equation of parabola open upwards.
On comparing it with standard vertex form, we get vertex (h,k)=(5,-37)
The axis of symmetry is the line x=5
We know that if then its minimum value is at
⇒Parabola has minimum value.
Ответ:
A) x=-5 is not an axis of symmetry but x=5 : ==>FALSE
B) (5,-37) is the vertex => TRUE
C) 5>0 => minimum TRUE
D) 5>0 ==>opens upward : TRUE
E) 10 is not negative :FALSE
Ответ:
7.6 m/s faster
Step-by-step explanation:
Speed of swimmer = 1.8 meters per second
The distance covered by runner = 200
Time of runner = 21.3 sec
We have to find the speed of the runner first so that we can compare with the speed of swimmer.
Speed = Distance/Time
=> 200/21.3
=> 9.4 m/s
So we have to find the difference between both speeds
Difference = 9.4 - 1.8
=> 7.6 m/s
So the runner was 7.6 m/s faster..