Answer:
(2, 5)
Step-by-step explanation:
plug the numbers into the equations
or
rearrange the top equation to be y = -5 + 5x
plug this in for y in the second equation.
-4x + 2 (-5 + 5x) = 2
solve for x
-10 + 6x = 2
6x = 12
x = 2
plug this into one of the equations to get y
-5*2 + y = -5
-10 + y = -5
y = -5 + 10
y = 5
Answer: Each notebook cost $2.55
Step-by-step explanation:
You divide $15.30 by 6, which equals $2.55.
Answer: 9
Explanation
This is because to find the area of a square you multiply base times height. In a square these lengths are the same.
The square root of 81 is 9.
2x+y=6
3x+5y=9
y = 6 - 2x
3x + 5( 6-2x ) = 9
3x + 30 - 10z = 9
7x = 21
x = 3
y = 6 - 2(3)
y = 0