A school supervisor wants to determine the percentage of students that bring their lunch to school. Which of the following methods would assure random selection of a sample population?
A
The supervisor should randomly select students from all grade levels taught at the school.
ОВ. The supervisor should randomly select one grade level and survey all of the students in that grade.
C. The supervisor should survey all of the students enrolled in the school.
CD. The supervisor should select one grade level and survey randomly selected students from that grade.

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)

the answer is 8/21

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answer: i think you should do the math and pay attention in class : )

step-by-step explanation:

that is truly what   think but if i get the answer i will

you could deduce the conclusion directly using the facts pertaining to the specific situation.

hope this .