Hree dentists wanted to compare the ages of their patients. they each calculated their patients’ mean age and the mean absolute deviation of their ages. they displayed the results in a table. which statements are true? select each correct answer. dr. cantwell’s patients’ ages and dr. singh’s patients’ ages vary about the same amount. dr. appiah’s patients’ ages vary less than do dr. singh’s patients’ ages. dr. appiah’s patients’ ages vary more than do dr. cantwell’s patients’ ages. dr. singh’s patients’ ages and dr. appiah’s patients’ ages vary about the same amount. dentist mean patient age mad appiah 43 9.7 cantwell 29 13.9 singh 41 14.1

the speed is   miles per hour > is false

step-by-step explanation:

we know that  

a relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form or

in a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin

the graph shown in the figure represent a direct variation

the slope of the line represent the speed

for the point

substitute the values of x and y

the linear equation is equal to

statements

case a) it takes hours to go miles

the statement is true

because

substitute

for

find the value of y in the linear equation

> is correct

case b) the speed is   miles per hour

the statement is false

because the speed is

case c) the unit rate for the trip is

the statement is true

because the speed is equal to the slope of the linear equation

case d) it took minutes to go the first miles

the statement is true

because

substitute

for

find the value of y in the linear equation

> is correct

question

given the diagram below, what is md?

the sum of the interior angles is 360°

take away from 360 the sum of the knows angles and you will have the angle d.

360 - 108 - 108 - 72 = 72°