Answer:
The mean is the number in the middle of the two. The mean of 5 and 7 is 6.
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Answer:
A (15)(0.75) and 0.7(15 - x) + 0.9x
Step-by-step explanation:
i took a test on this kind of math
3 because if the graph shows 1,2 there should be 3 even 1+2=3
i hope that helped you if you dont get anything just ask me thank you
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Answer:
17
Step-by-step explanation:
because 19 students for the other in total (you add the ones who study biology and the ones who study both, then you minus the group of students by 19)