Answer:
3
Step-by-step explanation:
Given
15 gold ribbons
22 blue ribbons
53 red ribbons
Total of 53 + 22 + 15 = 90 ribbons
Total number of students = 12 boys + 18 girls = 30 students.
If evenly divided, each student will have 90/30 = 3 ribbons
The expression to solve would basically be the amalgamation of what we did above:
(53 + 22 + 15)/(12+18)
 
        
             
        
        
        
Answer:
  Marta need to score at least 94 to receive an average of 90 or higher considering all five tests.
Explanation:
  Marks received by Marta in four tests =  86, 84, 97 and 89
  Let mark received in fifth test be x
  We have average of five test is more than or equal to 90
  So we have 
     
  So Marta need to score at least 94 to receive an average of 90 or higher considering all five tests.
 
        
             
        
        
        
La tabla relacionada con la pregunta se puede encontrar en la imagen adjunta a continuación:
Responder:
70%
Explicación paso a paso:
probabilidad de seleccionar aleatoriamente a un participante que haya obtenido entre 71 y 85 puntos:
Probabilidad = resultado requerido / Total de resultados posibles
Resultados posibles totales = Sumando la frecuencia para obtener el número total de estudiantes = (9 + 12 + 12 + 18 + 9) = 60 estudiantes
Resultado requerido:
Clase :
(71 - 75) = frecuencia = 12
(76 - 80) = frecuencia = 12
(81 - 85) = frecuencia = 18
Total = (12 + 12 + 18) = 42 = resultado requerido
Por tanto, P = 42/60 = 0,7 = (0,7 * 100%) = 70%
 
        
             
        
        
        
Answer: 
 - Equal midpoints of AC and BC.
 - The product of the slopes of the diagonals AC and DB is -1.
Step-by-step explanation:
 1. Plot the given points, as you can see in the graph attached.
 2. Calculate the midpoint of AC and DB:
 
 Therefore, the midpoint of AC and DB are equal.
 3. Calculte the slope of the diagonals AC and DB:
 
 4. Multiply the slopes of the diagonals:
  (AC and DB are perpendicular)
 (AC and DB are perpendicular)
 
        
             
        
        
        
Answer:
hiiiiiiiii
Step-by-step explanation: