Answer: 
<u>Step-by-step explanation:</u>
3(3 + x) = 7x - 9
9 + 3x = 7x - 9 <em>distributed 3 on the left side</em>
<u> -3x</u> <u> -3x </u>
9 = 4x - 9
<u>+9 </u> <u> +9 </u>
18 = 4x
<u>÷4 </u> <u>÷4 </u>
= x
Answer:
Nice square Mr. Denson.
Step-by-step explanation:
Answer:
Step-by-step explanation:
Given that an observation from a normally distributed population is considered "unusual" if it is more than 2 standard deviations away from the mean. There are several contaminants that can harm a city's water supply. Nitrate concentrations above 10 ppm (parts per million) are considered a health risk for infants less than six month of age.
We can say 1.59 and 2.52 if taken average would be the mean
Mean = 2.01
The deviations on either side = 2.52-2.01 = 0.41
This can be taken as 2 std dev
So std dev = 0.205
Hence we can take nitrate concentration is normal with mean = 2.01 and std deviation is 0.205
N(2.01, 0.205)
(-22 + 6) - (- 28 + 2)
(-16) - (-26)
-16 + 26
answer is 10.
Answer:
1,000.0cm^2
Step-by-step explanation:
i hope this is right