1. Which situation can be represented by 3s=55-5? A Three loaves of bread cost $5 less than 5 loaves of
bread. What is the cost of a loaf of bread?
B Three times a number is the same as five times the
difference of the number and 5. What is the number?
C Three times Leah's age is the same as her age
multiplied by 5 and then increased by 5. What is Leah's
age?
D The length of a side of an equilateral triangle is s
units. The perimeter of the triangle is equal to 5 times
the length of a side increased by 5 units. What is the
length of a side of the triangle?

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.

days of the week

step-by-step explanation:

javier earned more money then kyle, so that won't always be a constant term, but the days of the week do not change so that term is always constant.

edit: i meant