Problem: 28÷(15-11)³+3² (please tell me what i did wrong)

What I did wrong: 28÷(15-11)³+3²
28÷4³+3²
7³+3²
147+3²
147+9
156

What makes a trapezoid an isosceles trapezoid?

For the functions f(x) = -922 – 2x and g(x) = -32? + 6x – 9, find (f - g)(x) and (f - ).

Fifty students are trying to raise at least 12,500 for a class trip. they have already raised 1,250. how much should each student raise on average in order to meet the goal? write and solve the two step inequality for this problem