Dexter had 15 fish in his fish tank. 7 were
goldfish. the rest were neon tetra fish.
then he added 4 neon tetra fish.
how many neon tetra fish are in the tank now?
.
? neon tetra fish
v done

12

Step-by-step explanation: so sart by subtracting 15 and 7

15-7

this gives you 8

now add 4

8+4

this gives you 12

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

where did you get them? if you picked from the grass, is is probably poisonous.

step-by-step explanation: