Arailroad tunnel is shaped like a semiellipse

the height of the tunnel at the center is 58 ft and the vertical clearance must be 29 ft at a point 21 ft from the center. find an equation for the ellipse.

How to write 3 tenths and 5 tenths as a decimal

Simonne used the following steps to simplify the given expression. 12 - 3(-2x + 4) step 1: 12 + (–3)·(–2x) + (–3)·(4) step 2: 12 + 6x + (–12) step 3: 12 + (–12) + 6x step 4: 0 + 6x step 5: 6x what property of real numbers was used to transition from step 3 to step 4? a. identity property of addition b. inverse property of addition c. associative property of addition d. commutative property of addition

Assemble the proof by dragging tiles to the statements and reasons column