liddopiink1
21.12.2019 •
Mathematics
The mayor of a small town wants to determine the opinion of citizens of his town on the building of a new recreation center. he will select every fifth name on a list of town citizens to survey.
what type of sampling strategy is the mayor using?
a.
convenience
b.
simple random
c.
stratified random
d.
systematic
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Ответ:
39
Step-by-step explanation:
His number is x.
"If you subtract 19 from my number"
x - 19
"and multiply the difference by - 7"
-7(x - 19)
"the result is -140."
-7(x - 19) = -140
Divide both sides by -7.
x - 19 = 20
Add 19 to both sides.
x = 39
The number is 39.