If 3x−y=12, what is the value of 8x2y? a) 212 b) 44 c) 82 d) the value cannot be determined from the information given.

D

Step-by-step explanation:

3x−y=12

rearranging  y=3x-12  or   x=y/3+4

8x*2y

=8x*(3x-12)  or  8(y/3+4)*2y

=24x^2-96x  or  16y^2/3+64y

either one value cannot be determined unless x or y is known

so ans is D) The value cannot be determined from the information given.

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

i think 1: 2

step-by-step explanation: