So the right answer is B 942 ft^2
Answer:
7th graders- 100 students
8th graders- 110 students
Step-by-step explanation:
Let the number of 8th graders be represented by x and 7th graders be represented by y
<u>Equation based on number</u>
There difference between 8th and 7th graders is 10 hence equation becomes
x-y=10
<u>Equation based on contribution</u>
While x contribute each $8 and y contribute each $5, the total contribution is $1380 hence the equation becomes
8x+5y=1380
<u>Combining equations</u>
Having the two simultaneous equations which are
x-y=10
8x+5y=1380
Solving the equations.
5x-5y=50
8x+5y=1380
------------------
13x=1430
x=1430/13=110
Therefore, 8th graders are 110. Since the 8th graders were 10 more than 7th graders, the 7th graders will be 110-10=100 students
Answer:
6
∑ n^2
n=1
Step-by-step explanation:
There are 6 terms in the series, so we sum from 1 to 6
The terms are the integers squared
1^1, 2^2, 3^2 4^2, 5^2 6^2 or n^2
6
∑ n^2
n=1
Answer:
112,112,68
Step-by-step explanation:
On plato it doesn't like the ° or spaces in between numbers. I had to re answer so many times because of how picky the website is.
Answer:
Step-by-step explanation:
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