Tentukan penyelesaian setiap persamaan berikut. a. x-2[6-(1-2x) ]=0 b. 4[1-3(r+2) ]+2r=0

di sebuah toko Anisa membeli 4 barang a dan 2 barang b dengan harga 8000 dan Alena membeli 10 barang a dan 4 barang b dengan harga 19000 Tentukan selisih barang a dan b

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cara mencari akar-akar persamaan kuadrat dari persamaan kuadrat -2x 2 -4x-6

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3x+2y=5 x-y+2z=15 2x+y-z=-1 tentukan x, y, dan z

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jika A ={m,e,r,a,h} B={m,e,k,a,r} tentukan AUB

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129. Arrange the following sentences to form a sequential paragraph. (1) Therefore, they rely on sunshine for warmth. (2) They belong to a group of 3,800 scaly-skinned reptiles. (3) This is why they live in warm climates. (4) Lizards are reptiles. (5) Besides, they bask in the sun for hours each day. (6) They cannot control their own body heat. Adopted from: John Farndon, 1000 Facts on Animals. Essex, Miles Kelly Publishing Ltd, 2001. A. 1-4-2-6-3-5 B. 2-4-1-6-3-5 C. 4-2-6-1-3-5 D 2-4-1-6-3-5 130. Arrange the following sentences to form a sequential paragraph. (1) This "exchange" happens in the atmosphere, allowing the rays of the sun to pass and the Earth's heat to return to its source. (2) This causes the Earth's temperature increases. (3) What is "the green house effect"? (4) If the atmosphere is polluted, the rays of the sun can pass. (5) The Earth is warmed by the sun and in return emits heat into space. (6) However, because the Earth cannot return enough heat through the atmosphere, the balance between heat coming and going is altered. A. 5-1-3-4-6-2 B. 3-5-4-1-2-6 C. 3-5-1-4-6-2 D. 4-6-2-3-5-1

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