Two and four will work. Just plug in the numbers to see
Answer: A Quick silver
Step-by-step explanation:
he can run fast and is cool
Answer:
A) 
B) 14 gallons of gasoline
Answer:
and 
.
Step-by-step explanation:
Start by adding 1 to both sides of this equation.
.
The square of what number or numbers will lead to the number "1"? It turns out that not only 
, but 
as well. In other words, the value 
can be either 1 or -1. Either way, the equation is still going to hold. That's the reason why there are two solutions to this equation.
Consider the case when 
. Add 10 to both sides of the equation. 
.
Now, consider the case when 
. Again, add 10 to both sides of the equation, 
.
Order the two solutions in an increasing order:
- ,
- .
Answer:
Step-by-step explanation:
For this, we kind of have to test points to solve it. First, we can test theh interval x<= -2. Plug in -2 and we get a negative value which works. Next, let's try -2<x<0. Plug in -1 and get a positive value which doesn't work.
Next try 0<=x<=7. Plug in any number like 4 and get a negative value which works.
Finally, try x>7. Plug in 8 for example and you would get a positive value. So the solution is
x <= -2 OR 0 <= x <= 7
