Answer:
<u>Do Keep Change Flip (KCF)</u>
Keep:
Change: ÷ into ×
Flip: into
<u>Multiply</u>
<u>Divide</u>
If you are good at sequences in math please help I am giving more points
2 answers:
Answer:
-20 + 7(n-1)
Step-by-step explanation:
It's already given that d, or the common difference, is 7. The only thing left to do is to find the first term of this sequence.
We are given that = 50.
If we subtract the common difference 10 times we can find the first term.
- 7 x 10 = -70
50 - 70 = -20
The first term is -20. The only choice that shows this is the first one.
You might be interested in
We have given three school there, School A, School B and School C.
We are going to use following formula.
Total number of student in a school = Mean of number of student × Number of classrooms.
School A
Mean of students in School A = 32.5.
Number of classroom in School A = 25.
Number of students in School A = Mean × number of classrooms = 32.5×25 = 812.5
School B
Mean of students in School B = 29.6.
Number of classroom in School B = 12.
Number of students in School B = Mean × number of classrooms = 29.6×12 = 355.2
School C
Mean of students in School C = 15.3.
Number of classroom in School C = 10.
Number of students in School C = Mean × number of classrooms = 15.3×10 = 153.
Total sum of number of classes in all schools = 25+12+10 = 47.
Total sum of all students in all schools = 812.5 +355.2 +153 = 1320.7 .
The mean number of students per classroom for all the schools combined =
= = 28.1
The mean number of students per classroom for all the schools combined= 28.1