anahicaballero6
19.11.2020 •
Mathematics
. Albert bought some fish at a grocery store at $2 per pound for salmon and $4 per pound for catfish. He spent a total of $12 on salmon and catfish and bought a total of 4 pounds. This can be represented using the following system of equations: 4 s +2 c = 12 s + c = 4
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Ответ:
Intercepts at (0,7) and (0,03)
Vertex at (2,-25)
Step-by-step explanation:
Axis of symmetry is -b/2a = -(-4)/2(1) = 4/2 = 2 x=2
Plug x=2 into the equation and get 2^2-4(2)-21 = 4-8-21 = -25
Vertex is (2,-25)
Factor the equation (x-7)(x+3)
Set x-7=0, x=7
set x+3=0, x= -3
x intercepts at 7 and -3