Review Chapter 2-4 Chapter 2 Given that y is an integer, -3 < y ≤ 2.7, and y ≠ 0, write down all the possible values of y . It is given that z ≥ 41.5. Write down the least possible value of z if z is: an integer a prime number a perfect square Suggest a possible value of z for which z is a factor of 1260 and z is an even number. Solve the inequality 7 - (1/3) x ≥ 5 and represent the solution on a number line. A smartphone costs $750. Form an inequality and solve it to find the maximum number of smartphones that a company can buy with a budget of $25,000. Consecutive Even Numbers: Let the numbers be z , z +2, z +4. If the inequality z +( z +2)+( z +4)>120 is given, find the smallest even number z that satisfies this condition and calculate the product of t

Teori Trigonometri Trigonometri adalah cabang matematika yang mempelajari hubungan antara sisi dan sudut dalam segitiga. Berikut ini adalah penjelasan lengkap tentang konsep-konsep dasar trigonometri: Ukuran Sudut Terdapat dua jenis ukuran sudut yang umum digunakan dalam trigonometri: 1. Derajat : Satu putaran penuh = 360° $$1^{\circ} = \frac{1}{360} \text{ putaran}$$ 2. Radian : Perbandingan antara panjang busur dengan jari-jari lingkaran $$\alpha \text{ radian} = \frac{\text{panjang busur}}{\text{jari-jari}}$$ Hubungan antara derajat dan radian: $$1 \text{ radian} = \frac{180^{\circ}}{\pi}$$ $$1^{\circ} = \frac{\pi}{180} \text{ radian}$$ Fungsi Trigonometri Dasar Terdapat enam fungsi trigonometri dasar yang didefinisikan dalam segitiga siku-siku: 1. Sinus (sin) : $$\sin \alpha = \frac{\text{sisi depan}}{\text{sisi miring}}$$ 2. Cosinus (cos) : $$\cos \alpha = \frac{\text{sisi samping}}{\text{sisi miring}}$$ 3. Tangen (tan) : $$\tan \alpha = \frac{\text{sisi dep

Physical Properties of Metals Pure metals allow their ions to slide over each other, a characteristic shown in the provided table and figure. Alloys like brass and steel are created by mixing metallic elements with others to enhance strength and prevent deformation. The differing sizes of ions in alloys inhibit sliding, improving shape retention compared to pure metals. Reactivity Series Highly reactive metals like potassium and sodium react vigorously with cold water, while others react more slowly. Metals above hydrogen in the series can react with dilute acids to produce salts and hydrogen. The reactivity of metals influences their ability to displace other metals from compounds. Ionic Equations and Displacement Reactions Magnesium can displace copper due to its higher reactivity, forming positive ions more readily. Zinc powder heated with copper(II) oxide demonstrates a similar displacement reaction. No reaction occurs when zinc oxide is heated with copper,

  Mindmap: Market Failures and Socially Undesirable Outcomes Central Theme: Market Failures Externalities Positive Externalities Benefits to others not involved in the transaction Examples: Education, healthcare Solutions: Subsidies, government provision Negative Externalities Costs imposed on others not involved in the transaction Examples: Pollution, noise Solutions: Taxes, regulations Public Goods Characteristics: Non-excludable, non-rivalrous Examples: Street lighting, national defense Issue: Free-rider problem Solution: Government provision Asymmetric Information Definition: Imbalance of information between parties Consequences: Market inefficiencies, adverse selection Solutions: Regulation, transparency Equity vs. Efficiency Equity: Fair distribution of resources

                    Zat     dan     Perubahannya                                 Jenis Zat                 Padat             Cair             Gas             Perubahan     Wujud             Membeku             Mencair             Menguap             Perubahan     Sifat             Fisika             Kimia             Klasifikasi     Zat             Unsur             Senyawa             Campuran                                                             Macam Zat dan Perubahannya Macam Zat dan Perubahannya Pengertian Zat dan Jenisnya Zat atau materi adalah segala sesuatu yang menempati ruang dan memiliki massa. Zat terbagi menjadi tiga jenis utama: zat padat , zat cair , dan gas , yang masing-masing memiliki karakteristik unik. Jenis Zat Zat Padat - Partikel-partikelnya berdekatan dan teratur, membuatnya sulit dipisahkan. Volume dan bentuk zat