7) A
8) C
9) B
I’m not certain but I hope this helps you...sorry if I got it wrong!!
Can anyone else figure this out
252 miles overall.
To find this, I took the 292 average for 4 days and multiplied it by 4. I also took the 220 mile average for 5 days and multiplied it by 5. I then added these two numbers and I got 2268 miles. In order to find the average, I divided the 2268 miles by the 9 total days.
I am gonna use substitution method.
Solve for y in first equation,
y + 4x = 8
y = 8 -4x
Put the above y value in second equation,
5x + 2y = 13
5x + 2(8-4x) = 13
5x + 16 - 8x = 13
-3x = 13-16
-3x = -3
x = -3/-3
x = 1/1 = 1
Put the x value in first equation,
y + 4x = 8
y + 4(1) = 8
y = 8 - 4
y = 4
Hence, the solution is (1,4)