Answer:
<em>{ - 2 , 8 } </em>
Step-by-step explanation:
( x² - 6x ) = 2
4² = ( x² - 6x )
x² - 6x - 16 = 0
- 6 = - 8 + 2
- 16 = - 8 * 2
( x - 8 )( x + 2 ) = 0 ⇒ 
= - 2 , 
= 8
<em>{ - 2 , 8 }</em>
Let r = usual driving rate
let t = usual driving time
We need to figure out t
The distance she covers in her usual time at her usual rate is r*t
The distance she covers in her new time at her new rate is:
(1+t)*((2/3)r)
Set this equal to each other and solve for t.
rt = (2/3)r + (2/3)rt
(1/3)rt = (2/3)r
(1/3)t = (2/3)
t = 2
So her usual time is 2 hours. (There's probably a faster way to do this)
1.) D
2.) A................
Answer:
4Na + 1O2 > 2Na2O
SF6 > 1S + 3F2
2FE2O3 > 4FE + 3O2
Step-by-step explanation:
1. Identify the Products and Reactants(always do O2 last)
2. determine how many atoms of each element are present on each side of the equation
3. Add Coefficients and never change the subscripts. If there's a coefficient in front of any compound, it is distributed to both elements.
4. find the total number of atoms on both sides of the equation and make sure they equal with each other
Answer:
Step-by-step explanation:
Vertex form of a quadratic equation is: y = a(x - h)² + k, where point (h, k) is the vertex
f(x) = 3(x - 2)² + 11
This is in vertex form, so the vertex is (2, 11)
*it's positive 2 because we are subtracting h in the equation, and we are subtracting positive 2 in our problem
