Assinale a alternativa que corresponde a matriz C, cujo resultado foi obtido na soma das matrizes A e B. Descritas logo abaixo: A = | - 3 5 2 |
| 6 4 8 |

B = | - 8 -9 12 |
| 45 6 -3 |

alternativa a) C = | -5 14 14 |
| 45 51 11 |

alternativa b) C = | -3 -4 2 |
| 51 10 3 |

alternativa c) C = | 9 4 12 |
| 51 10 5 |

alternativa d) C = | 5 4 12 |
| 51 10 5 |

alternativa e) C = | -11 -4 14 |
| 51 10 5 |

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

Aquantity with an initial value of 3900 decays exponentially at a rate of 35% every hour. what is the value of the quantity after 0.5 days, to the nearest hundredth?

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.