Subtract the mixed numbers by finding the common denominator. five and seven tenths minus one and two fifths equals blank

five and three tenths
four and nine tenths
four and three tenths
four and nine fifteenths

Simplify using positive exponents only.

Cherie works in retail and her weekly salary includes commission for the amount she sells. the equation s=400+0.15c models the relation between her weekly salary, s, in dollars and the amount of her sales, c, in dollars. interpret the slope of the equation.

Order the equations from least to greatest based on the number of solutions to each equation.-4^x -1 = 3^(-x) – 2 -3x + 6 = 2^x+13^x – 3 = 2x - 2