Answer:
Step-by-step explanation:
40 divided by 45 equals about 0.89
so its 89%
Just divide.
31 / 40 = .775
31/40 as a decimal is .775.
The cost of one is 1.02 so the cost of 8 will be 8.10
The solution is (5, 15)
Multiply the second equation by 2 and then add through.
3x + 2y = 45
8x - 2y = 10
-----------------
11x = 55
x = 5
Then plug in to get the y value
3(5) + 2y = 45
15 + 2y = 45
2y = 30
y = 15