trong một hộp đựng 20 viên bi màu đen khác nhau và 19 viên bi mài trắng khác nhau. hỏi có bao nhiêu cách sắp xếp cá viên bi thành hàng ngang mà có màu xen kẽ nhau?

hello from mrbilldoesmath!

answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb

ans789

step-by-step explanation:

“a term can be a signed number, a variable, or a constant multiplied by a + sign or j sign. in , the terms are 5x , 3y and 8. when a term is made up of a constant multiplied by a variable or variables, that constant is called a coefficient.” i hope this you.

b is the correct answer