Which polynomial is in standard form?

a)3xy+6x^3y^2-4x^4y^3+19x^7y^4

b)18x^5-7x^2y-2xy^2+17y^4

c)x^5y^5-3xy-11x^2y^2 +12

d)15+12xy^2-11x^9y^5+5x^7y^2

Remmi wrote the equation of the line y=⅓(x+2) he solved for x and got x=3y-2 which of the following is an equivalent equation for x? a.x=y-11/3 b.x=y+7/3 c.x=3(y-⅔) d.x=3(y+⅔)

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

Which of the following contains a variable?