Answers created by UmAir.A

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• Is bubbling the sign of a chemical or physical change?
  
• Question #90e4b
  
• A woman bought some large frames for $17 each and some small frames for $5 each at a close out sale. If she bought 18 frames for $174, how do you find how many of each type she bought?
  
• What are the actions of a catalyst?
  
• Question #e0f19
  
• Question #01b75
  
• How do you find the angles of a triangle given side a = 10, side b = 10, base = 15?
  
• In general, what is used to separate mixtures?
  
• What properties of water are demonstrated by water moving up a straw?
  
• What are atoms, molecules, and ions?
  
• How does lubricating a machine affect the output force exerted by the machine?
  
• Question #e45a9
  
• What is the equation for Calcium Carbonate?
  
• The height of a cylinder with constant volume is inversely proportional to the square of its radius. If h = 8 cm when r = 4 cm, what is r when h = 2 cm?
  
• How do you find the x and y intercept of #x – 9y = – 45#?
  
• How do you factor #x^3 + 13x^2 + 42x#?
  
• What type of ions are formed by transition elements?
  
• Many automobile passengers suffer neck injuries when struck by cars from behind. How does Newton's law of inertia apply here? How do headrests help to guard against this type of injury?
  
• How do you evaluate the expression: 25% of 2000?
  
• Question #846b3
  
• An unknown solution is found to have the ability to conduct an electrical current. When iron metal is exposed to the solution, it reacts and produces an orange precipitate and hydrogen gas. This unknown solution is best characterized as what?
  
• How do you simplify # (-2x^-5) x^7#?
  
• What is the equation of the line between #(1,3)# and #(-4,1)#?
  
• If a #5 kg# object is being constantly accelerated from #0m/s# to #12 m/s# over # 16s#, how much power is being applied at #t= 1 s#?
  
• If 2.0 J of work is done in raising a 180g apple, how far is it lifted?
  
• How does NaCl affect the boiling point of water?
  
• Which gas effuses faster: hydrogen or chlorine? How much faster?
  
• What are all the theories that explain the creation of the universe?
  
• Question #0990d
  
• Can #y=x^2-4x-12 # be factored? If so what are the factors ?
  
• How is force described?
  
• How do solve the following linear system?: # y=-6x-9 , -3x+7y=-1 #?
  
• What is 40 increased by 20%?
  
• If Joe rides his bicycle in a straight line for 15 min with an average velocity of 12.5 km/h south, how far as he ridden?
  
• What is the definition of an irregular quadrilateral?