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MAXImum [283]
3 years ago
14

Se hizo un estudio entre los estudiantes de Licenciatura en ingeniería de software y sistemas computacionales, a 40 de estos est

udiantes se les pidió que estimen el número de horas que habrían dedicado a estudiar la semana pasada (tanto en clase como fuera de ella), obteniéndose los siguientes resultados:
Mathematics
1 answer:
chubhunter [2.5K]3 years ago
3 0
Ok I just got off the work with and my my phone phone is died I have got to to get get up up ok ok
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In ∆ABC, m∠ACB = 90°, m∠A = 40°, and D ∈ AB such that CD is perpendicular to side AB. Find m∠DBC and m∠BCD.
podryga [215]

Answer:  ∠B = 50°

               ∠BCD = 40°

<u>Step-by-step explanation:</u>

ACB is a right triangle where ∠A = 40° and ∠C = 90°.

Use the Triangle Sum Theorem for ΔABC to find ∠B:

∠A + ∠B + ∠C = 180°

40° + ∠B + 90° = 180°

         ∠B + 130° = 180°

                  ∠B = 50°

BCD is a right triangle where ∠B = 50° and ∠D = 90°.

Use the Triangle Sum Theorem for ΔBCD to find ∠C:

∠B + ∠C + ∠D = 180°

50° + ∠C + 90° = 180°

         ∠C + 140° = 180°

                  ∠C = 40°

8 0
3 years ago
it took a toy car 1 minute to roll 180 ft. what was this cars average rate of speed, in ft per second?
Korvikt [17]
3 feet per second (ignore this)
7 0
3 years ago
A contractor records all of the bedroom areas, in square feet, of a five-bedroom house as: 100, 100, 120, 120, 180 What is the v
kifflom [539]
The variance is the total of the squared distances of the given data from the mean. 

This can be calculated through the equation,
        
                            σ² = summation of X² / N  - μ²

where σ² is the variance X's are the data, N is the number of terms, and μ is the mean.

   summation of X² = 100² + 100² + 120² + 120² + 180² = 81200
                          N = 5
                                        μ = (100 + 100 + 120 + 120 + 180) / 5
                                         μ = 124

Substituting these values to the equation for variance,
                                 
                              σ² = (81200/5) - 124² = 864

Thus, the variance is equal to 864. 
4 0
3 years ago
Read 2 more answers
A boat traveled 12 miles north and then
katrin [286]

Answer:

25.5 mi

Step-by-step explanation:

12 22.5  X

Let X be the shortest distance we are trying to find.

a units 2 b units 2 c units 2

12 units 2 + (22.5)=c units 2

144+506.25=c units 2

650.25=c units 2

\sqrt{x} 650.25=c units 2

25.5

8 0
3 years ago
What is the simplest form of 8/40?
ehidna [41]
1/5 is the Simples Form
5 0
3 years ago
Read 2 more answers
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