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alexandr402 [8]
3 years ago
5

Helpp me please! 20 ch

Mathematics
1 answer:
-Dominant- [34]3 years ago
5 0
V=120, l=8, h=1.5

W = V/hl

W=120/8(1.5) = 10
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In a class, 60% of the students are girls. There are 18 girls in the class. How many boys are in the class? How many students ar
seraphim [82]
Percentage of students that are girls in the class = 60%
Number of girls in the class = 18
Let us assume the total number of students in the class = x
Then
60% * x = 18
(60/100) * x = 18
6x/10 = 18
6x = 18 * 10
6x = 180
x = 180/6
   = 30
So the total number of students in the class is 30.
Number of boys in the class = 30 - 18
                                               = 12
So there are 12 boys in the class. I hope the procedure is simple enough for you to understand.
8 0
3 years ago
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True or false? Brainlest of explanation
nalin [4]

Answer:c and d

Step-by-step explanation:

4 0
2 years ago
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How do you do this question?
likoan [24]

Answer:

a) -7/9

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When n = 1, there is only one term in the series, so a₁ = s₁.

a₁ = (1 − 8) / (1 + 8)

a₁ = -7/9

The sum of the first n terms is equal to the sum of the first n−1 terms plus the nth term.

sₙ = sₙ₋₁ + aₙ

(n − 8) / (n + 8) = (n − 1 − 8) / (n − 1 + 8) + aₙ

(n − 8) / (n + 8) = (n − 9) / (n + 7) + aₙ

aₙ = (n − 8) / (n + 8) − (n − 9) / (n + 7)

If you wish, you can simplify by finding the common denominator.

aₙ = [(n − 8) (n + 7) − (n − 9) (n + 8)] / [(n + 8) (n + 7)]

aₙ = [n² − n − 56 − (n² − n − 72)] / (n² + 15n + 56)

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The infinite sum is:

∑₁°° aₙ = lim(n→∞) sₙ

∑₁°° aₙ = lim(n→∞) (n − 8) / (n + 8)

∑₁°° aₙ = 1

8 0
2 years ago
4 more than 6 times a number m
Darya [45]

Answer:

6m + 4

Step-by-step explanation:

6 x m + 4 =?

6 x m = 6m

6m + 4 is your end result.  It cannot be simplified any more.

6 0
3 years ago
Please help on problem 14! Thanks!!
pickupchik [31]
2 hours has more the the other so I would say it would be 8
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3 years ago
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