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$1.25 |
$4.00 |
$8.75 |
$2.00 |
$3.25 | |
Amy | √ | √ | |||
Tom | √ | √ | |||
Linda | √ | √ | |||
Tina | √ | √ | |||
Sam | √ | √ |
1．Amy wants a hamburger and milk. It’s 3.35 dollars.
2．Tom wants a hot dog and milk. It’s 12 dollars.
3．Linda wants a sandwich and juice. It’s 7.50 dollars.
4．Tina wants a hamburger and juice. It’s 4.50 dollars.
5．Sam wants a sandwich and juice. It’s 7.25 dollars.
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
