Answer:
Numbers of pitchers of lemonade = 8
Step-by-step explanation:
Given as
Amount of lemonade concentration = 
of a cup
Now, 
of a cup of concentration mix with 
of water
So, - = 
of cup of lemonade,
∴ The number of small pitcher of lemonade = 
= 4 × 2 = 8 Answer
Vertical stretch by a factor of 3 and a reflection over x-axis is g(x)= -3|x|
5x + y = 9....multiply by 7
10x - 7y = -18
----------------
35x + 7y = 63 (result of multiplying by 7)
10x - 7y = -18
----------------add
45x = 45
x = 45/45
x = 1
5x + y = 9
5(1) + y = 9
5 + y = 9
y = 9 - 5
y = 4
solution is : (1,4)
=========================
-4x + 9y = 9
x - 3y = -6 ....multiply by 4
----------------
-4x + 9y = 9
4x - 12y = -24 (result of multiplying by 4)
---------------add
- 3y = - 15
y = -15/-3
y = 5
x - 3y = -6
x - 3(5) = -6
x - 15 = -6
x = -6 + 15
x = 9
solution is : (9,5)
-1, -8
0, -9
1, -10
2, -11
Hope that helps!
