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- The scatter diagram shows the ages and secondhand prices of 10 cars. a) What type of correlation is shown by the graph? negative correlation b) One of the cars is considered a 'collector's classic , so its age doesn't affect its price as much. Write"down the coordinates of the cross that you think represents this car on the graph. (4,5000)
- 3 (a)Find the value of the reciproc al of 1.6 Give your answer as a decimal.
- Read the definition. egomania : excessive preoccupation with oneself What is the root word in egomania? eg ego man mania
- 46. How do endothermic processes differ from exothermic processes? 47.Two substances in a glass beaker chemically react, and the beaker becomes too hot to touch. a. Is the reaction endothermic or exothermic? b. If the two substances are defined as the sys- tem,what constitutes the surroundings? Classify these processes as endothermic or exothermic. a. condensing steam b. ev aporating alcohol c. burning alcohol d. baking a potato
- 7 Martina has three lorry loads of paving slabs. There are x paving slabs on lorry A. There are (2x-1) paving slabs on lorry B. There are (3x+5) paving slabs on lorry C. There is a total of 58 paving slabs on the three lorries. All the paving slabs have the same mass. The paving slabs on lorry B have a total mass of 680 kg. Work out the total mass of the paving slabs on lorry A.