The numbers of blue, red, green and black pencils are proportional to the numbers 2, 3, 5, and 7, respectively. if we add the number of the difference of black and green pencils, and the number of the difference of red and blue pencils, then we will get 12. how many green pencils are there? me

78.59 is the mean

step-by-step explanation:

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

answer: -2+√x,-2-√x

i hope this , i don't know if you're looking for a pair or not.