In how many different ways can 4 physics, 2 math and 3 chemistry books be arranged in a row so that all books of the same branch are together?

1-for what value of x is line a parallel to line b 2-for what value of x is line a parallel to line b

Kayla has a $500 budget for the school party.she paid $150 for the decorations.food will cost $5.50 per student. what inequality represents the number of students,s, that can attend the party?

Line wx is parallel to line yz. if m