Answer:
estimate = 90/150 = 6/10 students chose longer days, four days a week.
Step-by-step explanation:
To increase the confidence, you could interview even more students.
i hope this helps, i haven't done this in school in a while!
:)
Find the value of n.
(-y + 5.3) + (7.2y - 9) = 6.2y + n
Transfer 6.2y to the other side and change its sign.
(-y + 5.3) + (7.2y - 9) - 6.2y = n
Solve for the value of n.
-y + 5.3 + 7.2y - 9 - 6.2y = n
group like terms
-y + 7.2y - 6.2y + 5.3 - 9 = n
0 + (-3.7) = n
-3.7 = n
Substitute n with its value.
(-y + 5.3) + (7.2y - 9) = 6.2y + n
(-y + 5.3) + (7.2y - 9) = 6.2y + (-3.7)
-y + 5.3 + 7.2y - 9 = 6.2y - 3.7
Group like terms
-y + 7.2y + 5.3 - 9 = 6.2y - 3.7
6.2y - 3.7 = 6.2y - 3.7
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Hope this Helps
Step-by-step explanation:
[1/2]^-2= 4
[1/3]^-2=9
[1/4]^-2=16
So sum is 4+9+16=29
Hope this helps you.
