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Helen [10]
3 years ago
14

Each day the wildlife commission releases 100 fish into the Durkee River in the following proportions: 55 brown trout and 45 rai

nbow trout.All of the fish swim through a watch station, one at a time,on the way upstream.which of the following expression represents the way to calculate the probability of a passing fish being a rainbow trout? 1. 45/55 2. 45/ 100 3. 55/100 4. 55-45/100 5. 45 +55 /100
Mathematics
1 answer:
bazaltina [42]3 years ago
6 0
45/100 so, 45 of every 100 fish should be rainbow trout.
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A beverage company surveyed 450 adults to determine the demand for summer drinks.
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Answer:

174 people preferred drinking water.

Step-by-step explanation:

Given that:

A total of 450 males and females were surveyed.

203 were males.

Number of females = 450 - 203 = 247 females

247 females were surveyed.

Now, we will find the number of females who prefer water.

Let,

x be that number.

Total number of females = Soda + Iced tea + Lemonade + Water

247 = 28 + 44 + 67 + x

247 = 139 + x

247-139 = x

x = 108

Number of people who prefer water = 108 + 66 = 174

Hence,

174 people preferred drinking water.

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3 years ago
Find the number of sides for a regular polygon whose interior angles each measure 10 times each exterior angle
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Answer:

22 sides

Step-by-step explanation:

The expression to find an interior angle of a polygon is:

\frac{(n-2)*180}{n}

The expression to find an exterior angle of a polygon is:

\frac{360}{n}

Please note that "n" represents the number of sides the polygon has.

We can use these two expressions to set up an equation.

\frac{(n-2)*180}{n}=10(\frac{360}{n})

Multiply both sides by "n":

(n-2)*180=10n(\frac{360}{n})

Now, distribute:

180(n)-180(2)=\frac{3600n}{n}\\180n-360=3600

Divide both sides by 10:

\frac{180n}{10}-\frac{360}{10}=\frac{3600}{10}\\

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Add 36 to both sides:

18n=360+36\\18n=396

Divide both sides by 18:

n=22

The polygon has 22 sides

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2 years ago
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Rewrite 3 3/4 as an improper fraction

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Now you have

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Now multiply the top numbers together and the bottom numbers together:

( 15 x 7) / (4 x 5) = 105/20

Write as a proper fraction:

105/20 = 5 1/4

5 0
3 years ago
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