Betty earns $7.50 per hour at a part-time job. let x be the number of hours and y be the amount she earns. betty makes a graph to show how x and y are related. if she earns $60, how many hours did she work? (no need for a graph) ! 75 pts!

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

1; 35 is the ratio

step-by-step explanation: