6.6, 7.2, 7.8 Hopefully I helped, if this was not what you were looking for tell me, I will try my best
X=1 Step-by-step explanation:
The correct question is
Which is the graph of (x – 2)^2 + (y + 6)^2 = 4^2?
we have that
(x – 2)² + (y + 6)² = 4²
this is the equation of a circle with center at (2,-6) and radius r=4 units
the answer is
see the attached figure
Answer: 400 miles
Solving Steps:
0.4x + 80 = 0.5x + 40
-0.1x + 80 = 40
-0.1x = -40
x = 400 miles
Answer:
96.4% of people have an IQ score between 69 and 132
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:
What percentage of people have an IQ score between 69 and 132, to the nearest tenth?
The proportion is the pvalue of Z when X = 142 subtracted by the pvalue of Z when X = 69. The percentage is the proportion multiplied by 100. So
X = 132
has a pvalue of 0.983
X = 69
has a pvalue of 0.019
0.983 - 0.019 = 0.964
0.964*100 = 96.4%
96.4% of people have an IQ score between 69 and 132