Penjelasan dengan langkah-langkah:
1) -34 - (-12) = -34 + 12 = -22
3) = -16 + 42 × (-2) : (-21) × 28
= -16 + (-84) : (-21) × 28
= -16 + 4 × 28
= -16 + 112
= 96
[tex]4) \: \: k = 2 \times \pi \times r \\ = 2 \times \frac{22}{7} \times 3.5 \\ = 2 \times 22 \times 0.5 \\ = 44 \times 0.5 \\ = 22 \: cm[/tex]
[tex]5) \: \: l = \pi \times r \times r \\ = \frac{22}{7} \times 21 \times 21 \\ = 22 \times 3 \times 21 \\ = 66 \times 21 \\ = 1386 \: {cm}^{2} [/tex]
Maaf kalo ada yg salah dan juga maaf aku gak bisa bantu yg no 2 :D
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Penjelasan dengan langkah-langkah:
1) -34 - (-12) = -34 + 12 = -22
3) = -16 + 42 × (-2) : (-21) × 28
= -16 + (-84) : (-21) × 28
= -16 + 4 × 28
= -16 + 112
= 96
[tex]4) \: \: k = 2 \times \pi \times r \\ = 2 \times \frac{22}{7} \times 3.5 \\ = 2 \times 22 \times 0.5 \\ = 44 \times 0.5 \\ = 22 \: cm[/tex]
[tex]5) \: \: l = \pi \times r \times r \\ = \frac{22}{7} \times 21 \times 21 \\ = 22 \times 3 \times 21 \\ = 66 \times 21 \\ = 1386 \: {cm}^{2} [/tex]
Maaf kalo ada yg salah dan juga maaf aku gak bisa bantu yg no 2 :D