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# In need of urgent help!

+2
120
7
+117

1) At the Gooddog Obedience School, dogs can learn to do three tricks: sit, stay, and roll over. Of the dogs at the school:

50 dogs can sit & 17 dogs can sit and stay |

29 dogs can stay & 12 dogs can stay and roll over |

34 dogs can roll over & 18 dogs can sit and roll over |

9 dogs can do all three & 9 dogs can do none.

How many dogs are in the school?

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2) Solve for z in the following equation: 2-iz = -1 + 3iz.

Oct 2, 2020
edited by DragonXlayer  Oct 2, 2020
edited by DragonXlayer  Oct 2, 2020
edited by DragonXlayer  Oct 2, 2020

#1
0

1) There are 72 dogs in the school.

Oct 2, 2020
#2
+117
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Sorry that is wrong, anyone else?

Oct 2, 2020
#3
0

1)75

2)3/{4i}

Oct 2, 2020
#4
+28025
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Draw a V enn diagaram and complete it to find 81 dogs in the school

Oct 2, 2020
#6
+848
+1

1) At the Good dog Obedience School, dogs can learn to do three tricks: sit, stay, and roll over. Of the dogs at the school:

50 dogs can sit & 17 dogs can sit and stay |

29 dogs can stay & 12 dogs can stay and roll over |

34 dogs can roll over & 18 dogs can sit and roll over |

9 dogs can do all three & 9 dogs can do none.

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If I'm not mistaken (again :)) there are 84 dogs.

Oct 2, 2020
edited by jugoslav  Oct 2, 2020
#7
+848
+2

You just need to add up all the numbers on the diagram, and you'll get the answer.

Sit-circle the total is 50

Stay-circle the total is 29

Roll-circle the total is 34

jugoslav  Oct 2, 2020
edited by jugoslav  Oct 2, 2020