Question

在一月的某一天，内布拉斯加州 Lincoln 的最高气温比最低气温高 $16$ 度，最高气温与最低气温的平均值是 $3^\circ$ 。这一天 Lincoln 的最低气温是多少度？

On a particular January day, the high temperature in Lincoln, Nebraska, was $16$ degrees higher than the low temperature, and the average of the high and low temperatures was $3^\circ.$ In degrees, what was the low temperature in Lincoln that day?

$-13$

$-8$

$-5$

$-3$

$11$

答案：C

知识点：平均数一次方程

难度评级：920

解答：

最高气温比最低气温高 $16$ ，所以最低气温比平均值低 $8$ 。平均值为 $3^\circ$ ，因此最低气温为 $3 - 8 = -5^\circ$ 。所以正确答案是 C。

The high exceeds the low by $16,$ so the low is $8$ below the average. Since the average is $3^\circ,$ the low temperature is $3 - 8 = -5^\circ.$ Thus, the correct answer is C.

2013 AMC 12B 第 1 题

答案：C

难度评级：920

解答：

其他年份的第 1 题