Answer:
x = -2
Step-by-step explanation:
2(x + 1) = -2
Divide both sides by 2.
x + 1 =
Divide −2 by 2 to get −1.
x + 1 = -1
Subtract 1 from both sides.
x = -1 - 1
Subtract 1 from −1 to get −2.
x = -2
Hope it helps and have a great day! =D
~sunshine~
There are two possible expressions that can help to calculate "x"
First
Second
Both are possible to find "x".
Answer:
A person must get an IQ score of at least 138.885 to qualify.
Step-by-step explanation:
Problems of normally distributed samples are solved using 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 problem, we have that:
(a). [7pts] What IQ score must a person get to qualify
Top 8%, so at least the 100-8 = 92th percentile.
Scores of X and higher, in which X is found when Z has a pvalue of 0.92. So X when Z = 1.405.
A person must get an IQ score of at least 138.885 to qualify.
Geometric-
5/9, 5/3,5,15,45,...
Arithmetic-
1/2,1,2,3,4,...
Neither-
16,11,6,1,-4,...
Hope this helps,