(1)南通到杭州大约有248千米车程,李叔叔已经开了1小时,剩下的路程比已经行驶的路程多98千米,李叔叔开车的速度是多少千米/时?(可先画图,再计算)
(2)李叔叔还提前预定了一间民宿,住宿费为450元/天,住2周。网上预付时获知每住满一周可减150元,李叔叔实际付了多少住宿费?
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2