Joe is building a fort for his little brother out of boxes. He is wondering how much room there will be inside the fort. plz don't mind my mouse :')

X2 + y 2 = 36 x + y = 6 solve the system of equations.

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.

Will give brainliestbased on the topographic map of mt. st. helens, what is the contour interval if the volcano height is 2,950 m?