Find the slope of the line

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?

If f(x)=x+7 and g(x)=1/x what is (fog)(x)

Which number line correctly shows 0.8 + 0.3?