You are paid $9.25/hr at your part-time job. you work 12 hours per week. you are considering working a part-time job for $5.90/hr that also pays tips. you will earn an average of $4.20/hr in tips. if you work the same 12 hours at the new job, there will how much more in your total gross income including tips compared to your old job?

 $ 10.2

Step-by-step explanation:

Since, the old rate = $ 9.25 per hour,

⇒ The total earning in 12 hours with this rate ( Gross income )  = 12 × 9.25 = $ 111

Also, New rate = ( $ 5.90 + $ 4.20 ) per hour = $ 10.1 per hour,

⇒ The total earning with this rate ( gross income ) = 12 × 10.1 = $ 121.2

Thus, the total difference between the new income and old income = 121.12 - 111 = $ 10.2

⇒ New gross income is $ 10.2 dollars greater than the old gross income.

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