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riadik2000 [5.3K]
3 years ago
5

The sum of two numbers is 28. The first number, x, is three times the second number, y.

Mathematics
1 answer:
saveliy_v [14]3 years ago
8 0

Answer:

x=21

y= 7

Step-by-step explanation:

x+y = 28

x = 3y

Substitute the second equation into the first

3y+y = 28

4y = 28

Divide by 4

4y/4 = 28/4

y = 7

Now we need to find x

x = 3*y

x = 3*7

x = 21

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What survival rate in the 10th year would make the average rate of loss over the 10-year period equal to 38.0%?
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Answer: 63%

Step-by-step explanation:

First find the rate of loss that would cause the average rate of loss over the 10-year period equal to 38.0%.

Assume that rate is x.

38 = (36.2 + 29.0 + 46.2 + 37.5 + 40.9 + 40.0 + 32.6 + 40.5 + 40.1 + x) / 10

38 = (343 + x ) / 10

380 = 343 + x

x = 380 - 343

x = 37%

The survival rate is the opposite of the rate of loss which means that the survival rate is;

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7 0
2 years ago
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4

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2 years ago
Find the discriminant of the following equation.<br> 4x2 + 16x + 16 = 0 ...?
kenny6666 [7]

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b = 16

c = 16

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256 - (4x64)

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2 years ago
0.3 x 103<br>0 3 x 1025<br>Write the following as an ordinary number. [<br>(1 Point<br>3x10​
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1. Triangle STU with vertices S(-4, 2) T(5, -1),
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Answer:

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Basically, we want to apply the given transformation rule of the axes to get the coordinates of the images

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2 years ago
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