Tell whether the sequence is arithmetic. If it is, identify the common difference.

Pls helpppppppppp ....

nadya68 [22]

Answer:

okay pls

spelling

is

wrong

6 0

4 years ago

Dea writes the expression 0.25 + 0.76 + 0.75 + 0.24. She rewrites the expression using the commutative property. Which expressio

ipn [44]

Answer:

B ) 0.25 + 0.75 + 0.76 + 0.24

Step-by-step explanation:

<u>commutative law of addition:-</u>

According to the commutative property of addition,changing the order of the numbers.we are adding doesn't change the sum.

let a,b,c+d are two numbers

The commutative property condition in addition a+b+c+d = a+c+b+d

Given expression 0.25+0.76+0.75+0.24 = 0.25 + 0.75 + 0.76 + 0.24

conclusion:- Answer B.

8 0

3 years ago

Mary and Jane both took PSY230 last semester but they were in two different sections taught by different professors. Mary's clas

Greeley [361]

Answer:

Due to the higher z-score, Jane did better in class.

Step-by-step explanation:

Z-score:

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

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:

Whoever's grade had the better z-score did better in class.

Mary's:

Mean of 85, standard deviation of 5, grade of 88. This means that $\mu = 85, \sigma = 5, X = 88$ . So