Answer:
8 ejercicios
Step-by-step explanation:
De acuerdo a la información dada, puedes plantear las siguientes ecuaciones:
x+y= 45 (1)
7x-1y= 19 (2)
x= ejercicios que resolvió bien
y= ejercicios que resolvió mal
Primero, puedes despejar x en (1):
x= 45-y (3)
Segundo, debes reemplazar (3) en (2):
7(45-y)-1y=19
315-7y-1y= 19
315-8y= 19
315-19= 8y
296= 8y
y= 296/8
y= 37
Tercero, debes reemplazar el valor de y en (3) para encontrar x:
x= 45-37
x= 8
De acuerdo a esto, la respuesta es que el hijo ha resuelto bien 8 ejercicios.
Answer:
Systematic sampling
Step-by-step explanation:
Systematic sampling is a form of random sampling that involves sampling based on numbering the members of the population and selecting the sample at a given specified interval.
However, when the systematic sampling technique is used, it is necessary to ensure that the numbering of the population does not result in an ordering of the population such that the selected sample will consist more of a particular group of the population.
If two parallel lines are cut by a transversal, then each pair of consecutive interior angles is supplementary.
If two parallel lines are cut by a transversal, then each pair of alternate exterior angles is congruent.
If two parallel lines are cut by a transversal, then each pair of alternate interior angles is congruent.
If two parallel lines are cut by the transversal, then each pair of corresponding angles is congruent.
Answer:
176
Step-by-step explanation:
14x12 = 168 + 8 = 176
Answer:
17x-15 ................... I needed to put dots so I can have 20 characters
