prestonlong53 prestonlong53

03-08-2019
Mathematics

contestada

The line of symmetry of the parabola whose equation is y = ax2 - 4x + 3 is x = -2. What is the value of "a"? -2 -1 -1/2

Respuesta :

Аноним Аноним

03-08-2019

Answer:

a = -1.

Step-by-step explanation:

y = ax^2 - 4x + 3

Convert to vertex form:-

= a(x^2 - 4/a) + 3

= a [ (x - 2/a)^2 - 4/a^2 ] + 3

From this we see that the line of symmetry is y = 2/a so

2/a = -2

-2a = 2

a = -1.

Answer Link

eric05henn eric05henn

07-04-2021

Answer: a=-1

Step-by-step explanation:

Answer Link

Otras preguntas

Evaluate:sin^-1(cos(7pi/4))

The perpendicular bisectors of triangle ABC intersect at point G and are shown in blue. Find BG

For the point P(-24,-24) and Q(-19,-19), find the distance d(P,Q) and theof the midpoint M of the segment PQ,coordinates

Line l passes through the points, (6,-14) and (2,-4) . If line m is parallel to line l, the slope of the line m is equal to

Jotham needs 12 liters of a 20% alcohol solution. He has a 10% and a 50% solution available. How many liters of the 10% and how many liters of the 50% solutions

I'm super confused as to what this question is asking

A line passes through the point (1, -6) and has a slope of 9.Write an equation in point-slope form for this line.

which expression would be easier to simplify if we use the associative property to change the grouping

12. Write the equation of the line that is perpendicular to the line x - 4y = 20 and passes through the point (2,-5).

Refer to the table which summarizes the results of testing for a certain disease. A test subject is randomly selected and tested for the disease. What is the pr