鞋的长通常用“码”或“厘米”作单位,码数y和厘米数x之间的关系是y=2x-10.小明穿37码的鞋,鞋长厘米;爸爸的鞋长26厘米,是码.
2019-05-28
鞋的长通常用“码”或“厘米”作单位,码数y和厘米数x之间的关系是y=2x-10.小明穿37码的鞋,鞋长________厘米;爸爸的鞋长26厘米,是________码.
优质解答
23.5 42
(1)根据题意,将y=37,代入y=2x-10,
即37=2x-10,
2x=37+10,
2x=47,
x=23.5;
(2)将x=26,代入y=2x-10,
即,y=2×26-10,
=52-10,
=42(码);
故答案为:23.5,42.
23.5 42
(1)根据题意,将y=37,代入y=2x-10,
即37=2x-10,
2x=37+10,
2x=47,
x=23.5;
(2)将x=26,代入y=2x-10,
即,y=2×26-10,
=52-10,
=42(码);
故答案为:23.5,42.