What is the value of the expression when y=5y=5 and z=3z=3
1 answer:
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Let y = ax²+bx+c then substitute all of orders. we'll be doing equations system.
Ok we are at this.
Substitute c = 3 into equation 1 and equation 3.
then addition and subtract for a-b = 3 and a+b = -1
Therefore a = -2, substitute a = -2 in a-b+c=0 or a+b+c=2 but i'm doing a-b+c=0 one.
Therefore b = 1, substitute both a, b and c into y=ax²+bx+c as we get,
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The slope would always be the coefficient of x, so in this case, we can already rule out A and B. C and D are left now.
Since the line passes through the point (4,-1), let's sub in x = 4 (since the x value is 4), and if we get y = -1, the answer can be determined.
Option C:
y =
x - 
Sub x = 4,
y =(4) -
= 1
The answer was NOT y = -1, so we can rule out C.
That leaves us with the only option D, and just to check in case:
y =
=
= -1
D is definitely the answer! Hope this helped!
Since the line passes through the point (4,-1), let's sub in x = 4 (since the x value is 4), and if we get y = -1, the answer can be determined.
Option C:
y =
Sub x = 4,
y =
= 1
The answer was NOT y = -1, so we can rule out C.
That leaves us with the only option D, and just to check in case:
y =
=
= -1
D is definitely the answer! Hope this helped!