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serious [3.7K]
3 years ago
8

Slove proportion 2/43 = j/13

Mathematics
1 answer:
I am Lyosha [343]3 years ago
5 0

Step-by-step explanation:

The easiest way to solve proportions is by cross multiplying.

2/43 = j/13

43j = 26

Now simply divide:

j = 26/43

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cole puts 68 books in a bookcase.he puts an equal number of books on each of 9 shelves and 5 books on the last shelf. how many b
fredd [130]
9x + 5 = 68
9x = 63
x = 7
Cole put seven books on each shelf.
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4 years ago
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Solve for variable its in pre algebra
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Step-by-step explanation:

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3 years ago
HELP, PLATO!!!!!!!
Keith_Richards [23]

Answer:

the law of cosines with ABC

7 0
2 years ago
Ques
natulia [17]

Answer:

C

Step-by-step explanation:

In a Pythagorean triple the square on the longest side is equal to the sum of the squares on the other 2 sides.

A

longest side = 10 ⇒ 10² = 100

6² + 8² = 36 + 64 = 100

A is a Pythagorean triple

B

longest side = 17 ⇒ 17² = 289

8² + 15² = 64 + 225 = 289

B is a Pythagorean triple

C

longest side = 9 ⇒ 9² = 81

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89 ≠ 81

C is not a Pythagorean triple

D

longest side = 13 ⇒ 13² = 169

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D is a Pythagorean triple

6 0
3 years ago
Find x. Round to the nearest degree.
jeka94

The Law of Cosines features the 3 side lengths of a triangle, plus the measure of the angle opposite one of those sides.


We want angle x, which is opposite the side of length 39.


Then: a^2 = b^2 - 2ab cos C becomes 39^2 = 36^2 + 59^2 - 2(36)(59)cos x


or 1521 = 3481 + 1296 - 2(36)(59) cos x


Subtract (3481+1296) from both sides: 1521 - 4777 = -4248cos x

-3256 = -4248cos x

-3256

Then: cosx = --------------- = 0.766

-4248


Solving for x: x = arccos -0.766 = 0.698 radian, or 40 degrees (answer)

5 0
4 years ago
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