In a television advertisement, a company called "waist away" claimed the workout program on their set of dvds would people lose weight more than any other dvd workout program. to test this claim, an independent company, called "slim down," selected one other dvd program. they then randomly assigned half the volunteers to the waist away program and the other half to the slim down program. each participant was weighed before they started the program and then regularly participated in their assigned program for one month. after one month, each participant was weighed again. the percent of weight lost was recorded for each person, where negative values indicated a weight gain. what type of study was performed?

answer: the answer is ann

i’m sorry but i don’t know sorry

answer: (1,3) (3,-1) (5,-5) ?

step-by-step explanation:

system of linear equation

step-by-step explanation:

as given in the data

a= 20 , b= -12

let us suppose that it is a straight line equation

now we know the formula for the system of linear equation

b= ma + c )

here m is slope of a straight line which is equal to formula

m=   (ii)

and here c is a constant

now putting the value of a and b in equation (ii)

m=

m=

putting the value of a,b and m in equation (i) gives us

-12 = + c

-12=-12 + c

adding 12 to both sides

-12 +12 = -12 +12 +c

0 =c

or c=0

as the value of the constant is zero which gives us that it is a linear equation and this order pair satisfies the system of linear equations.