How many cubic blocks of side length 1/7 inch would it take to fill a cube with a side length of 3/7 inch?

What is the solution to the equation 9^(x+1) =27

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?

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?