Can some plz help me

Tell me how you got the it use the figures to answer questions 1and 2. in each diagram, line k is parallel to line l, and line t intersects lines. 1. based on the diagrams, what is the value of x? 2. how would you verify your answer for x?

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

The larger of two number is 4 less than twice the smaller number. the sum is 41. find the numbers