What is seven tenths minus four fifteenths?

What are the three outcomes of a discriminant? What is 46666667 converted to a fraction? What are negative fractions? What is 5 times 29? How many mg does 1 gram equal? What is the standard form of 0.32? How do you write 0.667 as a fraction? What is the factorization of the trinomial- x3 plus 13x2 plus 40x? Why did America increase math science and foreign language education after the success of sputnik 1? What are All the prime numbers between 1 to 200? How many times can 6 go into 630? What do you mean by set and reset accumulator? How would the fraction 1 over 2 look as a decimal? What prime numbers have the product of 81? How do you solve algebraic expressions? Is the meter centimeter or millimeter more useful for measuring the width and length of your classroom? How do you know when to use sine over cosine or cosine over sine? Does semiprecious mean precious? What is the prime factorition of numbers 1 to 180? Is 4 16ths equal to 1 4th?