Solving the systems of linear equations by substitution.

x+2y=6
5x+2y=18​

What were mkh company's cash flows from (for) operating activities in 20x1? $(180,300) $233,100 $268,200 $279,400?

Acar travels at an average speed of 56 miles per hour. how long does it take to travel 196 miles

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?