Is mabel a proper noun

What is 5x y-10? How many tenths in 10.862? A class of 25 students has 15 girls and 10 boys If one student is chosen at random What is the probability it is a girl? 9a equals 6a plus 4? Can you multiply unlike terms? How much is 150 feet x 150 feet as acre or lot size? How many times does 4 go into a 1000? If the area of a rectangle is 18 square inches and the length of the rectangle is twice it's width what is the length and width of the rectangle? Can you factor 3x2-20x-7? What number to the seventh power equals 128? What are the values of k when the line of y equals kx -2 is a tangent to the curve of y equals x squared -8x plus 7? If Lynn can type a page in p minutes what piece of the page can she do in five minutes? What complementary angle to a 70 degrees angle has a measure of? In what year were the first 100 digits of pi caculated? What is 2 to the 16th power equals? How do you factor 3r - r- 4? What solid has four faces? In the case of a quadratic function what is the number of x and y intercepts the function may have? How many solutions will a system have if the graph of the solution is parallel lines? How do you put 2 m 100 cm 4 dm and 3 km in order?