12(x+ -6) =2(x+-9)
order of terms:
12(-6+x) = 2)x+-9)
(-72 + 12x) = 2(x+-9)
record the terms:
-72 +12x=2(-9+x)
-72+12x=(-9*2+x*2)
-72+12x=(-18+2*x)
solving
-72+12x= -18+2x haaaa im not doing the whole work on here but
answer i got was ( x=5.4 )
Answer:
The probability that a randomly selected boy in secondary school can run the mile in less than 302 seconds is 0.0107
Step-by-step explanation:
Consider the provided information.
It is given that mean is 440 seconds and standard deviation is 60 seconds.
z factor for less than 302 seconds would be: ![z=\frac{x-\mu}{\sigma}](https://tex.z-dn.net/?f=z%3D%5Cfrac%7Bx-%5Cmu%7D%7B%5Csigma%7D)
z = (302 - 440) / 60 = -2.3
The probability of getting a z factor of less than -2.3 = 0.0107 approximately.
looking up in the z-table for a z factor of -2.3.
The probability of a student running the mile in less then 302 seconds would be 0.0107.
Hence, the probability that a randomly selected boy in secondary school can run the mile in less than 302 seconds is 0.0107
Answer:
The correct answer would be the very first one: x > 9.
Step-by-step explanation:
Hope this helps!
I think the answer might be x=4/8