I believe the answer is -51+60 because it equals -9. And -51-(-60) is 9.
Option D. 96 is the correct answer.
Explanation:
Let the higher grade be = x
Let the lower grade be = y
As given, The difference of the two grades is 16
or
.... (1)
The sum of one-eighth of the higher grade and one-half of the lower grade is 52.
... (2)
Putting the value of x=16+y in equation (2)
![\frac{16+y}{8}+\frac{y}{2}=52](https://tex.z-dn.net/?f=%5Cfrac%7B16%2By%7D%7B8%7D%2B%5Cfrac%7By%7D%7B2%7D%3D52)
![\frac{16+y+4y}{8}=52](https://tex.z-dn.net/?f=%5Cfrac%7B16%2By%2B4y%7D%7B8%7D%3D52)
![\frac{16+5y}{8}=52](https://tex.z-dn.net/?f=%5Cfrac%7B16%2B5y%7D%7B8%7D%3D52)
![16+5y=416](https://tex.z-dn.net/?f=16%2B5y%3D416)
![5y=400](https://tex.z-dn.net/?f=5y%3D400)
![y=80](https://tex.z-dn.net/?f=y%3D80)
As x=16+y
x=16+80 = 96
Hence, higher grade is 96.
Answer: GJ= 27.23
i dont know how to explain this lol sorry but that answer is right
Well, we know that y=1/2x+5 from the first equation. if we substitute that into the second equation, it becomes 2x + 1/2x +5 =1. solve for x. 2x+1/2x= -4, 2 1/2x=-4, x=-1.6. plug that in to one of the equations. 2(-1.6)+y=1, -3.2+y=1, y=-2.2. the solution is (-1.6, -2.2)
Both is a good deal. But the better deal is 10 liters for 24 dollars. Because there is more. Although 1 liter costs 2 dollars and 40 for both deals.