Encontrar dos números tales que, el triple del primero más el segund o es igual a 820. El
doble del primero menos el segundo es igual 34

There are 20 children in the cast of a class play and 8 of the children are boys of the boys 4 have a speaking part in the play and of the girls 8 do not have a speaking part in the play if a child from the cast of the place chosen at random what is the probability that the child has a speaking part

Select the sequences that are geometric.

Which of the following is the result of expanding the series