Which equation best represents this situation? the sum of 21 and an unknown number equal to 30. a. 21b = 30 b. 21 + b = 30 c. 21 divided by b = 30 d. 21 - b = 30 pl me

step-by-step explanation:

the options are kind of confusing. i can tell you what i see going on here when i look at the graph.

the class and exam medians are closely related, and it looks like the low outlier on the exam did pull the median lower. [tex][/tex]

$25

step-by-step explanation:

25 - 4.50 = 20.5

20.5 / 2 = 10.25

10.25 + 10 = 20.25

20.25 - 12.50 = 7.75

therefore the answer is $25 as shown as the first number.