Beth sold half of her comic books and then bought nine more. shoe now has 28. with how much did she begin?

Step-by-step explanation:

I believe the answer would be 38 i'm not 100% sure but here is why i think so. If Beth sold half of her comic books and then bought nine more that would mean ahe had 19 before she bought the other 9 so 19x2 which is 38 so she began with 38 then sold half which is 19 and then bought 9 more to now have 28.

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b

  or  

step-by-step explanation:

if the four friends split the cost, p, of the pizza evenly, then each friend pays one-fourth of the cost of the pizza.

the expression is   or