Answer:
vertex = (1, - 9 )
Step-by-step explanation:
The equation of a parabola in vertex form is
f(x) = a(x - h)² + k
where (h, k) are the coordinates of the vertex and a is a multiplier
Given
f(x) = x² - 2x - 8
To complete the square
add/ subtract ( half the coefficient of the x- term )² to x² - 2x
f(x) = x² + 2(- 1)x + 1 - 1 - 8
= (x - 1)² - 9 ← in vertex form
with vertex = (1, - 9 )
<span> (a) men ...extra information
</span><span>(b) hours to dig (c) holes
</span><span>(d) hours..............? holes
</span><span>
= (d) x (c)
---------------
b
</span>
I would go about solving this by elimination because the x variables are already the same so all you would have to do is change one equation to the opposite signs and add them, so it would look like:
7y + 5x = 19
+ -3y - 5x = -7
-------------------
4y=12
y=3
63 divided by 7 = 9 laps but it says more so from there make a reasonable amount so n= amount of laps that you ended up estimating
Answer:
This is the associative property of multiplication which states that you can multiply numbers in any order you would like.