Answer:
192/2 = 96 because is just the half of the number
x + y = 53
x -y = 9 Adding both equations
2x = 62
x = 31 y = 22
Answer:The answer is 8x10^7
Step-by-step explanationi took the thing
X + y = 19
10x + 4y = 100
This is a systems of equations.
Isolate x from the first equation:
x = 19 - y
Now, plug it into the second:
10(19 - y) + 4y = 100
190 - 10y + 4y = 100
-6y + 190 = 100
-6y = -90
y = 15
Plug y in and solve for x:
10x + 4(15) = 100
10x + 60 = 100
10x = 40
x = 4
There are four 10-point questions and fifteen 4-point questions.
