Twice a number is the same as
A number used twice
If that number where represent by x
Then
If x was used twice would look like
What
Answer:
The answer is either
or 
You can make x into
Step-by-step explanation:
Answer:
The answer is below
Step-by-step explanation:
Let x represent the profit made from sales and c(x) the commission based on sells. If the profit is less then $1000,they 21%, hence:
if x < 1000, c(x) = 0.21x
If the profit is less between $1000 and $1200,they 22.5%, hence:
if 1000 < x < 1200, c(x) = 0.225x
If the profit is greater than $1200,they 23.5%, hence:
if x > 1200, c(x) = 0.235x
Therefore the commission represented as a piecewise function is:

Answer:
Step-by-step explanation:
a)

b)
Rationnel roots are divisor of -2: -1,1,-2,2

c) see picture
Answer:
$75
Step-by-step explanation:
If it costs $25 for two hours and we want 6 hours, we simply multiply it by 3 because 6/2 = 3.
$25 * 3 = $75