接上题，x方差为（）。 A: 0.95 B: 0.785 C: 1.90 D: 1.57

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2022-11-02 问题

接上题，x方差为（）。 A: 0.95 B: 0.785 C: 1.90 D: 1.57

2022-06-06 问题

For February, the cost components of a picture frame include ￥0.40 for the glass, ￥0.67 for the wooden frame, and ￥0.83 for assembly. The assembly desk and tools cost ￥570. Two hundred fifty frames are expected to be produced in the coming year. What cost function best represents these costs? A: y = 1.90 + 570X B: y = 570 + 1.07X C: y = 570 + 1.90X D: y = 1.07 + 570X

For February, the cost components of a picture frame include ￥0.40 for the glass, ￥0.67 for the wooden frame, and ￥0.83 for assembly. The assembly desk and tools cost ￥570. Two hundred fifty frames are expected to be produced in the coming year. What cost function best represents these costs? A: y = 1.90 + 570X B: y = 570 + 1.07X C: y = 570 + 1.90X D: y = 1.07 + 570X

2022-07-23 问题

仪仗队队员对身高H的选拔要求是：高于1.85米，但不能超过1.90米。下列表达式能正确表达的是（） A: H>1.85AndH<=1.90 B: H>=1.85AndH<=1.90 C: H>=1.85orH<=1.90 D: H>1.85orH<=1.90

仪仗队队员对身高H的选拔要求是：高于1.85米，但不能超过1.90米。下列表达式能正确表达的是（） A: H>1.85AndH<=1.90 B: H>=1.85AndH<=1.90 C: H>=1.85orH<=1.90 D: H>1.85orH<=1.90

2022-07-25 问题