Đáp án:
Câu 4. D; Câu 5. C
Giải thích các bước giải:
Câu 4.
Vĩ x/-4 = -12/8, nên: x= -12 . -4 : 6 =8
Vậy x=8
Câu 5.
Vì khi rút gọn phân số -2/-16=2:2/16:2 = -1/-8
Xin hay nhất ạ
`↓↓↓`
Câu 4
`x/(-4) = (-12)/6`
`-> 6x = -4 . (-12)`
`-> 6x = 48`
`-> x = 8`
`-> D`
Câu 5`
`(-2)/(-16) = (-2 : 2)/(-16 : 2) = (-1)/(-8)`
`-> C`
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Điền vào chỗ trống Khong có hình đâu trả lời hộ nhé :3333
Cho tam giác ABC vuông tại A có AB=18cm, BC=30cm. Vẽ Ah vuông góc với BC tại H. Tính độ dài AH.Câu nào sau đây đúng: A. AH=14,4cm B. AH=15,4cm C. AH=16cm D. A,B,C đều sai
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Bài 6 : Tìm x,y,z biết : -4/8 = x/-10 = -7/y = z/-24
Nhanh 2 bài này đi ạ !>.
tặng 5 sao cho ai trả lời nhanh
Làm cho mik với ko đặt ngang nha
bài 1 .tìm x 4.(x-5)-(x+7)=-19 Bài 2 dùng tính chất phân phối để tính 199.(15-17)-199.(-17+5)
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