The answer is D.
To find this, you need to do (86+78+92+x)/4=85
You then multiply 4 to each side (to isolate x)
You are left with (86+78+92+x)=340
You can then subtract 256 (the value of 86+78+92) from both sides.
You then have x=84
Therefore, you know she must score an 84 on her next test to average an 85.
Answer:
You showed the right work and got the right answer!
x = 6
Step-by-step explanation:
Since B is in the middle of A and C, AB + BC = AC
So,
2x - 11 + 8 = x + 3
x - 3 = 3
x = 6
Answer:
OC
Step-by-step explanation:
The x value is the same on both side of the equation but the other number are not (8≠-5) so the equation can't be true no matter the value plugged for x
Hi!
The only true answer is DX = AX.
Hope this helps!
Answer:
x = -30
Step-by-step explanation:
1) x/2 = 4 - 19
2) x/2 = -15
3) x = -15*2
4) x = -30