<h2>(-∞,∞) </h2>
Step-by-step explanation:
PART A:
given 
This is true for all values of x.
So,x∈
-∞,+∞
PART B:
When 
,left hand side=
right hand side=
so,left hand side =right hand side
When 
,left hand side=
right hand side=
so,left hand side =right hand side
When 
,left hand side=
right hand side=
so,left hand side =right hand side
Answer:
16
Step-by-step explanation:
Answer:
Your answer would be 850
Step-by-step explanation:
Answer:
Option (b) is correct.
The profit from sales if the price of the T-shirts were $15 a pieces is $28.
Step-by-step explanation:
Given : The function 
is used to determine the profit on T-shirts sold for x dollars.
We have to find the profit from sales if the price of the T-shirts were $15 a pieces.
Consider the given profit function
For the profit, if the price of a t-shirt is $ 15
Put x = 15, we have,
Simplify, we have,
Also, 
Thus, we get, The profit from sales if the price of the T-shirts were $15 a pieces is $28.
X-y=11
2x+y=19
add them
x-y=11
<u>2x+y=19 +</u>
3x+0y=30
3x=30
divide 3
x=10
sub baack
x-y=11
10-y=11
minus 10
-y=1
times -1
y=-1
(x,y)
(10,-1)
