Answer: A number line is a pictorial representation of numbers on a straight line. It’s a reference for comparing and ordering numbers. It... View Article
Answer: (a) In the test tube where the gas is collected, Saloni needs to add some water. She must cover the tube and shake it vigorously. She'll... View Article
Answer: No, a toothbrush's handle and bristles should be made of different materials. A toothbrush's handle should be hard and strong, so it... View Article
Answer: tan 48° × tan 23° × tan 42° × tan 67° = 1 Consider LHS LHS = tan 48° × tan 23° × tan 42° × tan 67° We can write tan 48° = tan... View Article
Answer: 4p2 - 4q2 Using the identities (a + b) 2 = a2 + b2 + 2ab (a - b) 2 = a2 + b2 - 2ab Consider (4m + 5n)2 Using identity (a - b) 2 = a2 +... View Article
Answer: 40x Using the identities (a + b) 2 = a2 + b2 + 2ab (a - b) 2 = a2 + b2 - 2ab Consider (2x + 5)2 Using identity (a + b) 2 = a2 + b2 +... View Article
Answer: 98m2 + 128n2 Using the identities (a + b) 2 = a2 + b2 + 2ab (a - b) 2 = a2 + b2 - 2ab Consider (7m - 8n)2 Using identity (a - b) 2 = a2... View Article
