-Solve the system of equations.- 10y + 9x = -910y + 5x = -5
2 answers:
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Answer:
16
Step-by-step explanation:
If , just put the number
instead of
.
So:
Answer:
The class interval is: 20-30
Step-by-step explanation:
Let l be the lower class limit and u be the upper class limit.
Then according to given statement that class mark is 25
And
Class size is 10
So, the second equation will be:
Adding equation 1 and 2
Now putting u =30 in equation 1
A class interval is written in the form that lower limit comes first and upper limit comes second.
So,
20-30
Hence,
The class interval is: 20-30