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never [62]
3 years ago
12

The number of fish in a lake decreased by 25% between last year and this year.

Mathematics
2 answers:
Talja [164]3 years ago
7 0
The population would be 45 fish
Softa [21]3 years ago
6 0

Answer: This population, the population is 45 fish.

Step-by-step explanation: This problem can be solved by a rule of three.

Last year there were 60 fish in the lake. That was 100, that is, decimal 1.

This year it decreased 25%. So there 100%-25% = 75%, that is decimal 0.75. So

60 fish - 1

x fish - 0.75

This population, the population is 45 fish.

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A right triangle has a 30o angle. The leg adjacent to the 30o angle measures 25 inches.

What is the length of the other leg? Round to the nearest tenth.

14.4 in.21.7 in.28.9 in.<span>43.3 in.</span>
5 0
3 years ago
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Which one is longer?<br><br><br> 96 inches or 8 feet?
KengaRu [80]
They are both equal. 96/12=8 And 8x12=96. Hope that helped!
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Name a fraction that is less than 5/6 try to justify your answer
Gnom [1K]
3/2
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3 0
3 years ago
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Does the given equation of line form parallel lines or not
malfutka [58]

k:y=m_1x+b_1;\ l:y=m_2x+b_2\\\\k\ \perp\ l\iff m_1\cdot m_2=-1\\\\k\ ||\ l\iff m_1=m_2

k:x+4y=10\ \ \ |-x\\\\4y=-x+10\ \ \ \ |:4\\\\y=-\dfrac{1}{4}x+\dfrac{10}{4}\to m_1=-\dfrac{1}{4}\\\\l:3x-2y=5\ \ \ \ |-3x\\\\-2y=-3x+5\ \ \ \ |:(-2)\\\\y=\dfrac{3}{2}x-\dfrac{5}{2}\to m_2=\dfrac{3}{2}

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5 0
4 years ago
23 red marbles is 40% of _ marbles
andre [41]

Answer:

57.5 marbles rounding to 58 if you do not have partial marbles

Step-by-step explanation:

The number of marbles is equal to the percent of the marbles times the total number of marbles

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Change to decimal form

23 = .40 M

Divide by .40

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This  question is odd since you can't have part of a marble

I would round up and have 58 marbles

58 *.40 = 23.2 marbles

6 0
4 years ago
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