Answer:
Need help on this question i dont get it ima be posting some more but i need help on this on first
1 answer:
Answer:
The answer is B.
Step-by-step explanation:
Its B because in the problem it says $12 per yard which means it would be 12y. The 40 Rupesh already had so just add it and it would be 12y+ 40. The key word "At least" results into the sign being greater than or equal to. So the final answer would be 12y+40 148.
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Answer:
The x intercepts are x=-4 and x=2
axis of symmetry x=-1
vertex (-1,-9)
D: {x: all real numbers}
R: {y: y≥ -9}
Step-by-step explanation:
f(x) = x^2+2x-8
y= x^2+2x-8
Factor the equation
What 2 numbers multiply to -8 and add to 2
4*-2 = -8
4+-2 =2
y = (x+4) (x-2)
The x intercepts are found when we set y =0
0= (x+4) (x-2)
Using the zero product property
x+4=0 x-2 =0
x=-4 and x=2
The x intercepts are x=-4 and x=2
The axis of symmetry is halfway between the x intercepts. It is symmetric must be in the middle of the x intercepts
1/2 (-4+2) = 1/2(-2) = -1
The axis of symmetry is at x=-1
To find the vertex, it is along the axis of symmetry. Substitute x=-1 into the equation
y = (x+4) (x-2)
y = (-1+4) (-1-2)
=3*-3
=-9
The vertex is (-1,-9)
The domain is the values that x can take
x can be any number
D: {x: all real numbers}
The range is the values that y can take
since the parabola opens upward, the vertex is the minimum,Y must be greater than or equal to -9
R: {y: y≥ -9}
