Sam was asked to evaluate the expression 5x+3x+20 for x = 100. sam's work shown below. sam's work: 5x+3x+20 = 100 8x+20 = 100 8x = 80 x = 10 what mistakes did sam make? sam to answer the question correctly.

The value of given expression for x=100 is 820.

He should substitute the value of x in the given expression instead of equating it to 100.

Step-by-step explanation:

The given expression is

Sam want to evaluate the expression 5x+3x+20 for x = 100.

Substitute x=100 in the given expression.

The value of given expression for x=100 is 820.

Sam make his mistake in first step. He equate the given expression to 100.

He should substitute the value of x in the given expression instead of equating it to 100.

see below

step-by-step explanation:

7.   there are 10 data points in the set.   the middle point is between 5 and 6.   the middle point in the top half is 8   and the middle point in the bottom half is 3. to find the iqr , take point 8 and subtract point 3

mid term   point 8 = 100   point 3 = 88

iqr = 100-88 = 12

final   point 8 = 93   point 3 = 78

iqr = 93 - 78 = 15

the final has the greatest iqr

6.   b - there is a high data value that causes the data set to be asymmetrical for the males: the data for males are high and asymmetrical .   there is an outlier for the males that skews the data

5.   the   iqr is a better measure of spread for the movies and basketball games.   since the basketball game has an outlier, we do not want to use standard deviation for measurement.  

3.   the exam median is much higher than the class median.   the median line is farther to the right on the exams

2.   there is no way to tell what the means are from the box and whisker plots.