The marching band at parkland high school has 128 students of these 18.75% are ninth graders how many ninth graders are there in the band

Hey, Melany. To answer this problem, simply set up a proportion: . Now let's solve for x.

- Cross multiply:

- Isolate x:

This means that x = 24.

There are 24 9th graders in the band.

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