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Kaylis [27]
3 years ago
10

The sum of two numbers is 82. One number is three less than four times the other. Find the two numbers.

Mathematics
1 answer:
kondor19780726 [428]3 years ago
8 0

Answer:

17 , 65

Step-by-step explanation:

x+ y = 82

y = 4x - 3

=====================

Put the second equation into the first.

x + 4x - 3 = 82

5x = 85

x = 85/5

x = 17

17 + y = 82

x = 82 - 17

x = 65

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Find the value of p and q
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Answer:

The answer to your question is p =  27.7      q = 29

Step-by-step explanation:

Process

1.- Calculate the value of all the angles of the triangle

The angle of 50° and the one to the right are supplementary

                                   x + 50 = 180

                                   x = 130°

- The sum of the internal angles in a triangle equals 180°

                     30° + y + 130° = 180

                              y = 180 - 130 - 30

                              y = 180 - 160

                              y = 20°

- The angle of the right triangle

                     50 + 90 + z = 180

                              z = 180 - 90 - 50

                              z = 40°

If sum up the superior angles 20 + 40 = 60°, then the biggest triangle is a 30-60-90

2.- Calculate q using the trigonometric function tangent

                        tan Ф = q / 55

solve for q

                        q = 55 tan 30

                         q = 28.9 ≈ 29

3.-  Calculate the hypotenuse of the biggest triangle

                       h² = 55² + 29²

                       h² = 3866

                       h = 62,12

4.- Use law of sines to find p

                     \frac{p}{sin 20} = \frac{62.12}{sin 130}

solve for p

                       p = \frac{62.12 sin 20}{sin 130}

                       p = 27.74                        

5 0
4 years ago
Read 2 more answers
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3241004551 [841]

Answer: x=15

Step-by-step explanation:

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3 0
3 years ago
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Element X is a radioactive isotope such that every 51 years, its mass decreases by half. Given that the initial mass of a sample
pychu [463]

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Step-by-step explanation:

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t=\frac{2.303}{k}\log\frac{a}{a-x}

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a - x = amount left after decay process  

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Half life is the amount of time taken by a radioactive material to decay to half of its original value.

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t=\frac{2.303}{0.0135}\log\frac{7500}{6900}

t=6years

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Answer:

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