Answers created by Oscar

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• Why do electrons go from a higher energy state to a lower energy state when a chemical bond is formed?
  
• What are all the zeroes of the function `f(x) = x^2-169`?
  
• Iron reacts with dilute sulfaric acid according to equation, Fe+H2SO4---> FeSO4+H2, What mass of iron will react with 75cm3 of 0.5 M H2SO4?
  
• Convert 18 km/h to m/s? Answers with steps
  
• How do you solve the following system?: `6x - 4y = 3 , 6x+5y=18`
  
• In the Sahara Desert one day it was 136°F. In the Gobi Desert a temperature of -50°F was recorded. What is the difference between these two temperatures?
  
• Find an expression equivalent to (1-sin^2 θ) / (1-cos^2 θ)?
  
• 32 is 40% of what number?
  
• How do you write `3/5` as percent?
  
• A man charges $65 for a chair at a craft market. The materials for a chair cost $45 and there is a $75 fee for a booth at the market. How many chairs must he sell to make a profit?
  
• In England, mass is measured in units called stones One pound equals `1/14` of a stone. A cat has a mass of `3/4` stone. What is its mass in pounds?
  
• Find k such that x+3 is a factor of s(x)=x^3 +kx^2 +kx-15???
  
• How do you solve `m- 3\leq - 16`?
  
• How do you solve `2+ 3b = 20`?
  
• What is `\frac { 2} { 3} * \frac { 1} { 5}`=?
  
• What the radius of a circle with area 9?