Answers created by BDT Stu.

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• A store is having a sale where school supplies are 30% off their original price. A backpack is on sale for $11.20. What was the original price of the backpack?
  
• How do you solve the system of equations `x+y=25` and `95x + 110y = 2600`?
  
• How do you solve `2y ^ { 2} = 13y - 15`?
  
• Cups A and B are cone shaped and have heights of `35 cm` and `21 cm` and openings with radii of `12 cm` and `18 cm`, respectively. If cup B is full and its contents are poured into cup A, will cup A overflow? If not how high will cup A be filled?
  
• Solve this simple ratio question?
  
• Question #35738
  
• How is the graph of `y=1/3x^2-4` related to the graph of `f(x)=x^2`?
  
• How do you solve `7x-4(2-3x) = 3x-6+8x`?
  
• Question #2c178
  
• What is the common ratio of this sequence? 5,2,0.8,0.32
  
• I'm selling a can of soda for $1.00 and have to pay a 10% tax for each can I sell, but for every 10th can I sell I have to pay 5% extra. What would the equation for this be?
  
• Question #3929d
  
• What are the numbers that have exactly 5 factors?
  
• Question #ad734
  
• A triangle has corners at `(7 ,2 )`, `(4 ,3 )`, and `(5 ,1 )`. How far is the triangle's centroid from the origin?
  
• 2x^2=-4x-1 using quadratic formula?
  
• Rearrange the following equation to make G the subject, where r > 0 and M > 0 8 pi^2/G^3M = T^2/r^3. ?
  
• How do you solve `3p ^ { 2} + 2= 6p`?