Tuesday
July 22, 2014

Homework Help: math

Posted by jojo on Monday, April 30, 2007 at 9:10am.

Which three options are true about the quadratic equation??
y= 4t^2 + 16t + 18

A. The graph has a minimum.
B. The graph of y crosses the horizontal axis at t = 10 and t = 20.
C. The equation 4t^2 + 16 + 18 = 6 has one real solution.
D. The function has a maximum at t = 10
E. The vertex is at (-2, 2)
F. The function could represent the height y (in metres) of a particle moving under gravity, as a function of the time t (in seconds).

G. The graph intercepts the vertical axis at y = 18
H. The slope of the graph of y is always negative.

I think the answers are G, E and A. Is this correct

consider 4t^2 + 16t + 18=6

4t^2 + 16t + 18-6=0
b^2-4ac = 256-16*12 is a positive, so there are two real solutions.

so c is wrong.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

maths - Which three options are true about the quadratic equation?? y= 4t^2 + ...
Math - Choose the three true statements about the graph of the quadratic ...
math - Which three options are true about the quadratic equation?? y= 4t^2 + 16t...
calculus - If a function f is continuous for all x and if f has a relative ...
Algebra II - 1) There is a solution to x = -(y-5)^2 and x = (y -5 )^2 + 7 a) ...
Math - I am stumped on this problem could someone please help? Give the ...
Math - I am stumped could someone please explain this problem? Give the ...
Quadratic Functions - Please explain to me how to do the following problems, I ...
math - State the solutions, or estimated solutions, to each quadratic equation ...
ALGEBRA - What does it mean to give the solutions to the following quadratic ...

Search
Members