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babymother [125]
3 years ago
7

A triangle has a perimeter of 39 feet. If the three sides of the triangle are n, 4n-2, and 5n-9, what is the length of each side

Mathematics
2 answers:
Lemur [1.5K]3 years ago
7 0

n + 4n - 2 + 5n - 9 = 39 \\  \\ 10n - 11 = 39 \\  \\ 10n = 50 \\  \\ n = 5

so the lengths of the sides are 5, 18, 16

lyudmila [28]3 years ago
5 0

Answer:

The sides are 5,18,16

Step-by-step explanation:

To find the perimeter of a triangle, we add up all the sides

n +4n-2 + 5n-9 = 39

Combine like terms

10n -11 = 39

Add 11 to each side

10n-11+11 = 39+11

10n = 50

Divide by 10

10n/10 =50/10

n = 5

Now we need to find each side

n = 5

4n-2 = 4(5)-2 = 20-2 =18

5n-9 = 5(5) - =25-9 = 16

The sides are 5,18,16

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The ratio of coloured papers to wight papers is 3:8.If there are 48 wight papers, how many coloured papers are there?
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Answer:  The total number of colored papers is 18.

Step-by-step explanation:

Given: The ratio of coloured papers to wight papers is 3:8.

Let total number of colored papers = 3x

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4 0
2 years ago
Find the complementary angles of the following.
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Answer:

1. 87

A77

B24

C93

D47

E 31

F 48

2. 160

A10

B20

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D40

E 50

F 60

3. 68

A851

B295

C302

D574

E 112

F 638

4. 174

A3

B4

C5

D 6

E 7

F 8

5. a

A180-a

B180/2

C 179*a

D 179+a

E 60

F pi

Find the complementary angles of the following.

6. 53

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C 25

D 45

E 18

F 37

7. 12

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B78

C98

D31

E 52

F 64

8. 73.5

A16.5

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C29.4

D17.7

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F 11.3

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10. a

A90/a

Ba-90

Ca/2

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Two of the angles are listed. Find the measure of the third angle in each triangle. Similar to example 6

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D57

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18. a, (a + 80)

A100 - 2a

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C182 - 2a

D254 - 5a

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F 302 - 1a

19. x, (x + 20)

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B167 - 1x

C114 - 5x

D160 - 2x

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2. B

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6. F

7. B

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10. B

11. D

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13. D

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18. A

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Step-by-step explanation:

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