Answer:
(4, -25)
Step-by-step explanation:
One thing I wanted to say is thank you for including the equation to find the vertex! I literally had a brain fart and was like wait it is -b over 2a, then I looked and high fived myself lol but anyways. But anyways the question is what is the vertex of x²-8x-9??
First let's label this formula. The quadratic formula has three variables to label and it labels them as a,b, and c.
a= x² b= -8 c=-9 ( and yes the negative and positive sign makes a difference, trust me. :D )
So again what is the vertex equation? It is -b over 2a. So let's look at our functiion and plug in the numbers.
b= -8 => -b= -(-8) = +8
a= 1 => 2a= 2(1) = 2
So -b/2a equals a positive 8 divided by 2. 8 divided by two equals.. 4.
Yet what would be outcome of this equation. How about we input 4 into the equation we have.
f(x)= x²-8x-9
f(4)= (4)²-8(4)-9
f(4)= 16-(32)-9
f(4)= -16-9
f(4)= -25
So in this case (4, -25) is the vertex of this equation!!
Sorry for typing so much, I know it may be alot, but it's the answer. Yet, I really do hope I gave you a very clear answer. If you have any questions or comment, don't be afraid to say ask or even message me. If you have to. But anyways I hoped I help, have a great day!! :D
That would be 13.25, 13+1/4
= 13+(1 divided by 4 which is 0.25)
= 13+0.25
Which is 13.25 so your answer is 13.25, good luck hope that helps :D
Answer:
5*4*3*2*1= 120
you multiply each number to it's previous one till you reach 1
Y=Mx+b
Slope/M= -1
X= 3
Y= -1
-1 = -1(3)+b
-1 = -3 + b
Add +3 to -3 and -1 to cancel -3 out to get (b)
-3+3 = 0 cancel it
-1 +3 = 2
So, b = 2
In an equation it will be written as
y= -1x + 2
In standard form it will be
1x + y = 2
But your official answer will be
B= 2
Y= -1x+2
Answer:
Step-by-step explanation:
hello : y= 4x² + 5x + 2
the x-intercepts when y=0 means : 4x² + 5x + 2=0
a=4 b= 5 c=2
∆ = b²- 4ac ∆ = (5)²- 4(4)(2) =25-32 = -7
∆ < 0 no reals solutions no x-intercepts
