2x - 5x + 4 = 0
- 3x = - 4
x = 4/3
Answer:

Step-by-step explanation:
The graph of the two functions are shown on the same diagram in the attachment above;
The solution to the equation
is where the two graphs intersected.
These points are

Answer:
either a or c
Step-by-step explanation:
im sorry if they are both incorrect
Answer:
0.23
Step-by-step explanation:
Answer:
The cost of 1 doll = $ 7.5
and The Cost of 1 toy train = $ 5
Step-by-step explanation:
Let the price of 1 doll = $ x
The price of 1 toy train = $ y
Now, according to the question:
6 x + 2 y = $ 55
and 4 x + 7 y = $ 65
Solving the given system of equation,
From (1), we get


or, solving for y , we get
110y - 4y + 21 y = 195
or, 17 y = 85
⇒ y= 85/17 = 5
This implies : 6 x + 2 (5) =55
or, 6x = 55 - 10 = 45
or, x = 45/ 6 = 15/2
Hence, the cost of 1 doll = x = $ 7.5
and the Cost of 1 toy train = y = $ 5