An item was sold at a 60 % discount at a price 20 euros. What was the discount in euros?

Question

Алгебра: An item was sold at a 60 % discount at a price 20 euros. What was the discount in euros?

LPKenion · Accepted Answer

Выражение: 5*(3-5*a)^2-5*(3*a-7)*(3*a+7) 1. 5*(9-30*a+25*a^2)-5*(3*a-7)*(3*a+7) 2. 45-150*a+80*a^2+245 3. 290-150*a+80*a^2 Выражение: (a+1)^2+3*(a-1)^2-5*(a+1)*(a-1) 1. a^2+2*a+1+3*(a-1)^2-5*(a+1)*(a-1) 2. 4*a^2-4*a+4-5*a^2+5 3. -a^2-4*a+9 Выражение: 5*(1-y)^2*(3+y)^2-3*(1-y)*(1+y) 1. 5*(1-2*y+y^2)*(3+y)^2-3*(1-y)*(1+y) 2. 42-60*y-10*y^2+20*y^3+5*y^4+3*y^2 3. 42-60*y-7*y^2+20*y^3+5*y^4 Выражение: 5*(1+m)*(1-m)-(2-m)^3-8*(1-m) 1. (5+5*m)*(1-m)-(2-m)^3-8*(1-m) 2. -3-11*m^2+12*m+m^3-8+8*m 3. -11-11*m^2+20*m+m^3...

MOGZ ответил