One hose can fill a goldfish pond in 24 ​minutes, and two hoses can fill the same pond in 15 minutes. Find how long it takes the second hose alone to fill the pond

This is so hard and it’s for a test

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+8 and g(x) = 4x- 3, find (f+g)(x)