Answer:
12 students
Step-by-step explanation:
Given

Required
Determine the number of students that eat lunch once a week
In Sets;
If out of 9, at least 7 eats one a week then
9 - 7 eats lunch once a week

<em>In other words;</em>
2 out of 9 students eat lunch once a week
Number of students in this category is then calculated as thus;




change the 6 ito - 6 by turning to left side then you will have -3 -6 now you can add them (- + -) is + so you can add them the sign of 6 is greater so the answer is -9
Answer:
Division
Step-by-step explanation:
PEMDAS
Parenthesis
Exponents
Multiplecation
Division
Addition
Subtraction
You have both exponents and parenthesis, so your third step would be multiplecation, but you don't have that, so it would be division.
A characteristic that a rhombus and a rectangle always have in common, would be that they are both quadrilaterals. Hope this helped!
-TTL
The first term is -5, the 50th term is -5-2*49=-103
The sum is the average of these terms times number of terms, which is (-5-103)/2*50=-2700