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kati45 [8]
3 years ago
11

The number of fish in a lake decreased by 25% between last year and this year last year there were 60 fish in the lake what is t

he population this year? If you get stuck consider drawing a diagram
Mathematics
1 answer:
grandymaker [24]3 years ago
8 0

Answer:

45

Step-by-step explanation:

Decreasing by 25% means that there is 25% less of last years amount or 0.25x less. It also means that this year there is only 75% of what was last year actually in the lake or 0.75x. Since last year, there were 60 fish, this means this year there is 0.75(60) = 45. This year has 45 fish.

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Use the Pythagorean Theorem to solve for the missing side length. Round to the nearest tenth if necessary.
Ede4ka [16]

Answer:

B= 6

Step-by-step explanation:

pythagorean theorem formula is a² + b² = c²

so: 8² + b² = 10²

then: 64 + b² = 100

subtract 64 from both sides to get b²= 36

square root 36 and you get 6 for b

answer: B= 6

8 0
2 years ago
Need help... on this one plsss help
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Answer:

A

Step-by-step explanation:

Tiffany should have multiplied by 0.5 in step 1, not divided.

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Which pair of numbers is relatively prime A.)57 and 96 B.)68 and 118 C.)70 and 195 D.)143 and 323
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3 years ago
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The school Library was building a new one-room addition. the architects drawing shown below uses the scale 1/8 in = 1ft
EastWind [94]

Answer:

the total are is 459

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8 0
2 years ago
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17% of what number is 3.4
saw5 [17]

Answer:

20

Step-by-step explanation:

We already have our first value 3.4 and the second value 17. Let's assume the unknown value is Y which answer we will find out.

As we have all the required values we need, Now we can put them in a simple mathematical formula as below:

Step 1 ---> 3.4 = 17% × Y

Step 2 ---> 3.4 = 17/100 × Y

Multiplying both sides by 100 and dividing both sides of the equation by 17 we will arrive at:

Step 3 ---> Y = 3.4 × 100/17

Step 4 ---> Y = 3.4 × 100 ÷ 17

Step 5 ---> Y = 20

Finally, we have found the value of Y which is 20 and that is our answer.

<h3><u>*You can easily calculate 3.4 is 17 percent of what number by using any regular calculator, simply enter 3.4 × 100 ÷ 17 and you will get your answer which is 20*</u></h3>
4 0
2 years ago
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