Por favor é pra agora por favor me ajuda. É o 1 é o 2.

Logan wants to know how many skateboards have defective parts. he inspects 20,000 skateboards and keeps track of the number of defects per board. use his probability distribution table to find the expected value for defects on a skateboard.

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

Y= 4x + 3 y = - 1 4 x - 5 what is the best description for the lines represented by the equations?