Answer:
x=4, y=9
Step-by-step explanation:
Solve with substitution.
Part A
4x+6=2x-12
4x+6+12=2x
4x+18-2x=0
2x=-18
Part B
24=6x-18
4=x-3
The diagram of the right-angled triangle is shown below
Using the Pythagoras theorem
6² = a²+a²
36 = 2a²
18 = a²
a = √18 = 3√2
C
15 novelty eraser and a profit of $7
It means that x=15 and y=7
=> C and D is correct
Sold 25 erasers and a profit of $15
It means that x=25 and y=15
=> only C is right.
Answer:
0.014767
Step-by-step explanation: