Which shows how to use the distributive property to evaluate 6 • 78? question 3 options: 6 • (70 – 2) 6 • (70 – 8) 6 • (70 + 8) 6 • (70 + 2)

The answer is 6 • (70 + 8)

Step-by-step explanation:

The correct option is 6 • 78 = 6 • (70+8)

Step-by-step explanation:

Given a multiplication we can decompose each number in an equivalent sum or subtraction expression to use the distributive property.

For example :

4 • 12 = 4 • ( 3 + 3 + 3 + 3 ) = 4 • 3 + 4 • 3 + 4 • 3 + 4 • 3 = 12 + 12 + 12 + 12 = 48

In this case, we express the number ''12'' as the sum of the number ''3'' four times.

In the exercise,

6 • 78 = 6 • ( 70 + 8 ) = 6 • 70 + 6 • 8 = 420 + 48 = 468

We decomposed the number ''78'' as the sum of the number ''70'' and ''8''.

It's always more convenient to decompose the greater number in the multiplication.

Another possible solution could be (using subtraction) :

6 • 78 = 6 • ( 80 - 2 ) = 6 • 80 - 6 • 2 = 480 - 12 = 468

In the exercise, the correct option is 6 • ( 70 + 8 ) given that the other options are not equivalent to the expression 6 • 78

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.

answer: 0,6

step-by-step explanation:

this would make it the y intercept.