Simplify: (-2x - 3) – (3x2 – 8x + 9). Choose the standard form of the answer.
1 answer:
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Answer:
x = - 10 ±
Step-by-step explanation:
y = (x + 10)² , or
(x + 10)² = y ( take square root of both sides )
x + 10 = ± ( subtract 10 from both sides )
x = - 10 ±
well, since a foot is 12inches, 6' 3" will just be 6.25' and 13' 6" will be 13.5'.
Check the picture below.
Make sure your calculator is in Degree mode.
Answer:
79.91% of loaves are between 26.94 and 32.18 centimeters
Step-by-step explanation:
When the distribution is normal, we use the z-score formula.
In a set with mean and standard deviation
, the zscore of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this question, we have that:
What percentage of loaves are between 26.94 and 32.18 centimeters
This is the pvalue of Z when X = 32.18 subtracted by the pvalue of Z when X = 26.94.
X = 32.18:
has a pvalue of 0.8621
X = 26.94:
has a pvalue of 0.0630
0.8621 - 0.0630 = 0.7991
79.91% of loaves are between 26.94 and 32.18 centimeters