Which expression is equivalent to (3x^2-7)?

a. (2x^2-+4)
b. (5x^2--1)
c. (10x^2-+3)
d. (15x^2-+1)

The cash price of a television is $580.the hire-purchase price of the television is $865.the hire-purchase price is an initial deposit of n% of the cash price and 6 equal monthly payments of $120.find the value of n.

Hector and alex traded video games. alex gave hector one fourth of his video games in exchange for 6 video games. then he sold 3 video games and gave 2 video games to his brother. alex ended up with 16 video games. how many video games did alex have when he started?

Find the area of an equilateral triangle with a side of 6 inches