Thu gọn đa thức sau và tìm bậc của mỗi đa thức a) A=2x^2 y^5-5x^3 y-7x^2 y^5+4x^3 y-8x^2 y^5+6x^3 y;
c) C=2x^2 y-8y^2+5x^2 y+5z^2-3y^2+4z^2

$30 to spend on dinner tax and gratuity at mos restaurant rax is 6% and they give a 15% tip on the total bill after taxes thier dinner cost $21 which statement correctly explains wether andrew and kate have enough money to pay their bill