Danielle has 8 coins worth $0.36 if the coins are all nickels and pennies how many nickels and pennies does she have?

Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?

Two angles are complementary. the large angle is 36 more than the smaller angle. what is the measure of the large angle?

Find the area of the triangle formed by the origin and the points of intersection of parabolas y=−3x^2+20 and y=x^2−16.