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poizon [28]
3 years ago
12

The number of ducks swimming In a lake decreased by 1/4 between last year and this year. last year there were 60 ducks in the la

ke. What is the population this year? If you get stuck consider drawing a diagram.​
Mathematics
1 answer:
blagie [28]3 years ago
4 0

Answer:

Given: Population of ducks in lake, last year is 60.

Also, the population of ducks this year decreased by 1/4 th over the last year.

So, the population of ducks this year is = 60*(1-1/4)

                                                          = 60*(3/4)

                                                          = 45

Therefore, the population of ducks this year is 45 ducks.

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The sum of all the angles in a triangle is 180°.
There is a right angle -> a 90° angle on the hypotenuse of the largest triangle (the largest being the one that contains both smaller triangles)

To solve this problem, you don't really need to solve y.
Next to the 48° angle, you have two of the same angles, both x variables.
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Now that we have x, we can calculate the value of z.
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Calculating the value of z:
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Answer:

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