Lauren bought a sweater at the sale price of $25. the original cost of the sweater was $40. what percent represents the discount that lauren received when buying the sweater?

Solve for x by completing the square. 2x^2-4x+7=0

You are making a battery for a science project. you have copper wire for your first electrode. you need to choose a conductor, a second electrode, and a device to plug into your battery. you have already chosen a lemon conductor. complete each statement below about the options that include a lemon conductor.

Cora bought a package of erasers. there are 4 pink erasers and 12 blue erasers. what is the ratio of pink erasers to blue erasers?