How do i set up the equation for this? if the cost of gasoline goes up 10.7% this summer, how much will gas cost if it costs $3.85 per gallon now?

Ben wants to play a carnival game that costs $2. in his pocket he has 5 red tickets worth 35 cents each, and 15 blue tickets worth 10 cents each. which of the following systems of inequalities correctly represents the constraints on the variables in this problem? let represent the red tickets and b represent the blue tickets.

Given abcd ac=38 and ae=3x+4 find the value of x

It says factor each expression 49x-28?