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I am Lyosha [343]
3 years ago
11

A class of 25 students took a math test. Ten students had an average of 88. The other students had an average of 76.

Mathematics
2 answers:
muminat3 years ago
4 0

Answer:

80.8

Step-by-step explanation:

Reil [10]3 years ago
4 0

Answer:

You asked this 1 day after my birthday

Step-by-step explanation:

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A rancher plans to make 4 identical and adjacent rectangular pens against a barn (see figure below), each with an area of 100 m^
Tasya [4]

Answer:

10 by 10 meters

Step-by-step explanation:

In calculus terms, you can use the formula for the perimeter which is 2l + 2w, and the area l × w.

Then since the area is 100

l × w = 100. So w = 100/l

Then substitute this into the perimeter formula.

w = 100/l → 2l + 2(w) = 2l + 2(100/l) = 2l + 200/l.

Then take the derivative d/dx [take the derivative of a quantity with respect to x], by using a simpler method known as the power rule:

d/dx[x^n] = nx^n-1

so p = 2l + 200/l becomes p' = 2 - 200/l^2

Since the derivative of a constant is 0, to solve for l, set p' to 0

0 = 2 - 200/l^2 → -200/l^2 = -2 → 200/l^2 = 2 → 2l^2 = 200 → l^2 = 100 → l = √100, l = 10.

Now that we know the length is 10, We can substitute the length in the original equation to find the width.

l = 10 → w = 100/l → w = 100/10, w = 10.

Therefore the perimeter of each rectangular pen is 40, with a length of 10 and width of 10.

If you want to do this algebraicly, there are more steps involved

7 0
3 years ago
3/8-1/3<br><br><br><br> I rly need help and FAST
elixir [45]

Answer:

Step-by-step explanation:

1/24

6 0
3 years ago
Ten times the sum of half a number and 6 is 8.
asambeis [7]
The answer IS 8 itself .
4 0
3 years ago
Please help, need answer fast!
AleksandrR [38]
The answer is
B. 13ab

5ab+9ab-ab
=(5ab+9ab)-ab
14ab-ab
=13ab

Hope it helped : )
3 0
3 years ago
Which of the
Viefleur [7K]

Answer:

ASA

Step-by-step explanation:

I think is Asa because it means when any two angles and their included sides are equal in both triangles.

7 0
2 years ago
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