Q:

A) 0 | B) -2 |

C) -4 | D) 5 |

Answer: B) -2

Explanation:

Explanation:

$2000x\frac{X}{100}+4000x\frac{Y}{100}=320$

and $2000x\frac{X}{100}+10000x\frac{Y}{100}=680$

x = 4 and y = 6

x-y = -2

Q:

A) 13.37 percent | B) 26.02 percent |

C) 24.41 percent | D) 32.2 percent |

0
70

Q:

A) 30 percent | B) 32.25 percent |

C) 15 percent | D) 16.125 percent |

0
48

1
68

Q:

A) 35 percent | B) 30.8 percent |

C) 20.4 percent | D) 34 percent |

0
77

2
68

1
62

2
91

0
51