Robert sold 6 more magazine subscriptions the second week than he sold the first week. He sold twice as many the third week as he sold the first. If he sold 94 magazine subscriptions in all, how many did he sell the second week?

22

Step-by-step explanation:

let 1st week magazines sold be x

number of magazines sold in 2nd week is 6 more than 1st week that is (x+6)

number of magazines sold in 3rd week is double of 1st week that is 2x

total=94

x+(x+6)+2x=94

x+x+6+2x=94

4x=94-6

4x=88

x=88/4

x=22

c

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